Being an Evil Overlord seems to be a good career choice. It pays well, there are all sorts of perks and you can set your own hours. However every Evil Overlord I've read about in books or seen in movies invariably gets overthrown and destroyed in the end. I've noticed that no matter whether they are barbarian lords, deranged wizards, mad scientists or alien invaders, they always seem to make the same basic mistakes every single time. With that in mind, allow me to present...

1. My Legions of Terror will have helmets with clear plexiglass visors, not face-concealing ones.  A problem I don't have to worry about, since my soldiers have clear bodies.
2. My ventilation ducts will be too small to crawl through.  I guess it does make sense, but the vents would be more difficult to clean out if that were the case.
3. My noble half-brother whose throne I usurped will be killed, not kept anonymously imprisoned in a forgotten cell of my dungeon.   I don't have any relations of this type, so it doesn't worry me.  But if I did, I'd at least know which cell it was.
4. Shooting is not too good for my enemies.  It isn't that shooting is too good for my enemies, it's just that it lacks style.  I would suggest putting them in an easily escapable situation, involving an overly elaborate and exotic death.
5. The artifact which is the source of my power will not be kept on the Mountain of Despair beyond the River of Fire guarded by the Dragons of Eternity. It will be in my safe-deposit box. The same applies to the object which is my one weakness.  If someone was able to pull off getting tbhe artifacts from the other place, why would a safe-deposit box prove more challenging to them?
6. I will not gloat over my enemies' predicament before killing them. What's the point of getting rid of your enemy if you can't stop and smell the flowers along the way? They are in some sort of situation preventing them from doing something, and even if they do, you can easily kill them off anyway.  You can only kill your foe once, so make it enjoyable.
7. When I've captured my adversary and he says, "Look, before you kill me, will you at least tell me what this is all about?" I'll say, "No." and shoot him. No, on second thought I'll shoot him then say "No."  At most, I'd go with the first option.  If I don't tell my adversary what this is all about, then I'm not going to bother saying anything to them if they're already dead.
8. After I kidnap the beautiful princess, we will be married immediately in a quiet civil ceremony, not a lavish spectacle in three weeks' time during which the final phase of my plan will be carried out.  Getting hitched with a beautiful princess and then having your evil scheme completed would be an ideal wedding.  But do increase the security, though.
9. I will not include a self-destruct mechanism unless absolutely necessary. If it is necessary, it will not be a large red button labelled "Danger: Do Not Push". The big red button marked "Do Not Push" will instead trigger a spray of bullets on anyone stupid enough to disregard it. Similarly, the ON/OFF switch will not clearly be labelled as such.  I need to make sure that controls are easy enough for my... uh... minions to understand.  I am the evil genius, and they are not.
10. I will not interrogate my enemies in the inner sanctum -- a small hotel well outside my borders will work just as well.  Reserve a room for my enemy? I think not.  I have them, they're not going anywhere, so I might as well interrogate them here.
11. I will be secure in my superiority. Therefore, I will feel no need to prove it by leaving clues in the form of riddles or leaving my weaker enemies alive to show they pose no threat.  I'm not really the Nygma type myself, so I wouldn't leave riddles.  As to leaving weaker enemies alive, I'd take out the formidable enemies before taking the time to dispose of the others.
12. One of my advisors will be an average five-year-old child. Any flaws in my plan that he is able to spot will be corrected before implementation. Does Leadman count?
13. All slain enemies will be cremated, or at least have several rounds of ammunition emptied into them, not left for dead at the bottom of the cliff. The announcement of their deaths, as well as any accompanying celebration, will be deferred until after the aforementioned disposal.  Just to be sure that you don't waste any time or bullets, first yell down to ask if they're still alive.  If they answer yes, then shoot down at them or cremate them.
14. The hero is not entitled to a last kiss, a last cigarette, or any other form of last request.  This sounds about right; I mean, we are supposed to be the villians, right?
15. I will never employ any device with a digital countdown. If I find that such a device is absolutely unavoidable, I will set it to activate when the counter reaches 117 and the hero is just putting his plan into operation. This is true, devices can be remote control, instead of suing a timer.  Such an idea for the timer will hinder the hero, but it may also hinder yourself as well.  In some situations, you might for any reason still be around when it gets to 117; when you might need extra time for an escape.
16. I will never utter the sentence "But before I kill you, there's just one thing I want to know."  If things go south just from an explanation, most likely this kill might not have happened.  The only exception would be that it might have been a diversion and allowed time for something.  Should they get away, at least you will know what you wanted to know. 
17. When I employ people as advisors, I will occasionally listen to their advice. Alright, but remember to discard anything they should happen to say that has any trace of sarcasm or cynisism.
18. I will not have a son. Although his laughably under-planned attempt to usurp power would easily fail, it would provide a fatal distraction at a crucial point in time.  I found out that I will have a son in the future.  And even though I'm not yet sure about his aperations yet, I'm sure he wouldn't do anything to pose any problems to my plans for universal domination.
19. I will not have a daughter. She would be as beautiful as she was evil, but one look at the hero's rugged countenance and she'd betray her own father.  I don't have to worry about a daughter since I know I'm only going to have a future son.  And besides, it's just absurd to assume that a girl's hormones would be my own undoing.
20. Despite its proven stress-relieving effect, I will not indulge in maniacal laughter. When so occupied, it's too easy to miss unexpected developments that a more attentive individual could adjust to accordingly.  Give up maniacal laughter?!?! Never! Someone else can be watching...Mwah ha ha ha ha!!!
21. I will hire a talented fashion designer to create original uniforms for my Legions of Terror, as opposed to some cheap knock-offs that make them look like Nazi stormtroopers, Roman footsoldiers, or savage Mongol hordes. All were eventually defeated and I want my troops to have a more positive mind-set.  This is true, in the sense of giving the troops a good mind-set.  It's just a shame that nearly all of the cool looking appearances eventually lose.  It gets to the point where you think that the only way to insure victory is by having an army of guys wearing flannel coats and hats with earflaps. 
22. No matter how tempted I am with the prospect of unlimited power, I will not consume any energy field bigger than my head.  People shouldn't consume energy fields anyway; it leaves a nasty aftertaste.
23. I will keep a special cache of low-tech weapons and train my troops in their use. That way -- even if the heroes manage to neutralize my power generator and/or render the standard-issue energy weapons useless -- my troops will not be overrun by a handful of savages armed with spears and rocks.  Excellent advice, but troops made out of quartz can still be chased off by rocks.
24. I will maintain a realistic assessment of my strengths and weaknesses. Even though this takes some of the fun out of the job, at least I will never utter the line "No, this cannot be! I AM INVINCIBLE!!!" (After that, death is usually instantaneous.)  You just shouldn't take the fun out of being an evil overlord; it shouldn't become an obligation.  There should be no reason to say the death causing line anyway; if you assess your strengths and weaknesses right, there shouldn't be any weaknesses.
25. No matter how well it would perform, I will never construct any sort of machinery which is completely indestructible except for one small and virtually inaccessible vulnerable spot.  What the real concern is, how anyone would know about this weak spot? If the rest of the machinery is okay, then it shouldn't matter.
26. No matter how attractive certain members of the rebellion are, there is probably someone just as attractive who is not desperate to kill me. Therefore, I will think twice before ordering a prisoner sent to my bedchamber. If you still want the prisoner sent to the bedchamber, order a couple pairs of handcuffs and some rope to the bedchamber too.
27. I will never build only one of anything important. All important systems will have redundant control panels and power supplies. For the same reason I will always carry at least two fully loaded weapons at all times. With the way stuff goes up around M3 Base, it's good too keep a room full of the same stuff.  And who wouldn't want to keep around a lot of fully loaded weapons around anyway?
28. My pet monster will be kept in a secure cage from which it cannot escape and into which I could not accidentally stumble.  People shouldn't have monsters for pets anyway.  Get a normal pet, like a white fluffy cat to constantly stroke, or a penguin with a rocket attached to it's back.
29. I will dress in bright and cheery colors, and so throw my enemies into confusion.  I don't wear clothes too often; wearing such colors would probably throw me into confusion more than my enemies.
30. All bumbling conjurers, clumsy squires, no-talent bards, and cowardly thieves in the land will be preemptively put to death. My foes will surely give up and abandon their quest if they have no source of comic relief. When it comes to recruitment, you take what you can get.  And if this is true, then these guys could provide me with comedy relief too.
31. All naive, busty tavern wenches in my realm will be replaced with surly, world-weary waitresses who will provide no unexpected reinforcement and/or romantic subplot for the hero or his sidekick.  A good suggestion, but be sure to remind any of the staff that friendly service does not include helping out the good guys.
32. I will not fly into a rage and kill a messenger who brings me bad news just to illustrate how evil I really am. Good messengers are hard to come by.  Not always true, or at least when you mass produce beings that can act as messengers.
33. I won't require high-ranking female members of my organization to wear a stainless-steel bustier. Morale is better with a more casual dress-code. Similarly, outfits made entirely from black leather will be reserved for formal occasions.  Not only that, but it would be distracting.  The only female I work with is Dr. Tenecha; and a metal chest and lab coat combination wouldn't seem right.
34. I will not turn into a snake. It never helps.  The only reason that this would hinder is if you don't have any experience at being a snake.  Maybe after some practice, turning into a snake would be one of your greatest offenses.
35. I will not grow a goatee. In the old days they made you look diabolic. Now they just make you look like a disaffected member of Generation X. Fine, no goatee. But I'm pretty sure that fur and green continue to be in fashion.
36. I will not imprison members of the same party in the same cell block, let alone the same cell. If they are important prisoners, I will keep the only key to the cell door on my person instead of handing out copies to every bottom-rung guard in the prison.  It is understandable to keep prisoners in separate cells, and to reduce the number of available keys.  Just make sure that any unauthorized person who needs the key to free the important prisoners doesn't know you have it.
37. If my trusted lieutenant tells me my Legions of Terror are losing a battle, I will believe him. After all, he's my trusted lieutenant.  This may be true, but what I would want them to do is to keep fighting anyway, to buy time for whatever evil plan I have up where I would have a sleeve.
38. If an enemy I have just killed has a younger sibling or offspring anywhere, I will find them and have them killed immediately, instead of waiting for them to grow up harboring feelings of vengeance towards me in my old age. A solution that would take less time would be to make it seem that I had no involvement with the death.  If my enemy's relative(s) want to take me out anyway, then I'll go through with finding them and killing them off.
39. If I absolutely must ride into battle, I will certainly not ride at the forefront of my Legions of Terror, nor will I seek out my opposite number among his army.  Your position in legions of terror isn't as important as considering the fact that the enemy will be trying to take you out no matter where you are anyway.  Another idea would be to have a decoy of yourself riding into battle.
40. I will be neither chivalrous nor sporting. If I have an unstoppable superweapon, I will use it as early and as often as possible instead of keeping it in reserve.  Being so quick to use the superweapon implies that it is your only method of offense.  Don't use it unless absolutely necessary.  If the superweapon was your best bet and it should fail, then at least your adversarys would worn down a bit.
41. Once my power is secure, I will destroy all those pesky time-travel devices. I wouldn't destroy the time-travel devices to secure my power, so much as the fact is dealing with time travel is confusing and irritating.  But just in case, I will keep the lawnmower around.
42. When I capture the hero, I will make sure I also get his dog, monkey, ferret, or whatever sickeningly cute little animal capable of untying ropes and filching keys happens to follow him around. Good idea, but a word of caution: some cute little creatures may be capable of inflicting a lot of pain as well; in the form of claws, teeth, or thundershocks.
43. I will maintain a healthy amount of skepticism when I capture the beautiful rebel and she claims she is attracted to my power and good looks and will gladly betray her companions if I just let her in on my plans.  It is okay to show a little trust in these situations; the rebel is "supposedly" going to betray her companions when I "supposedly" tell her my plans.
44. I will only employ bounty hunters who work for money. Those who work for the pleasure of the hunt tend to do dumb things like even the odds to give the other guy a sporting chance.  The flaw with this method is that whenever you hire anyone for money, they can easily betray you if they are given a better offer.
45. I will make sure I have a clear understanding of who is responsible for what in my organization. For example, if my general screws up I will not draw my weapon, point it at him, say "And here is the price for failure," then suddenly turn and kill some random underling.  Treason and other forms of unloyalty should be punished by death.  The price of failure is no more chocolate milk for the rest of the term.
46. If an advisor says to me "My liege, he is but one man. What can one man possibly do?", I will reply "This." and kill the advisor.  Why don't I let my enemies kill off my own guys first, okay?  It's kind of hard for advisors to learn these things when  they're dead.
47. If I learn that a callow youth has begun a quest to destroy me, I will slay him while he is still a callow youth instead of waiting for him to mature.  I have seen such a situation before, and my warning would be that sometimes these callow youths may already a threat, without maturing.  They usually have dumb luck up the wazoo, and sometimes have powerful allies that you might not suspect.
48. I will treat any beast which I control through magic or technology with respect and kindness. Thus if the control is ever broken, it will not immediately come after me for revenge.  Similar to #28, you shouldn't have creatures around that would want to bring harm to you.  On a side note, if the creature can speak in some way, it might start spouting out crap about "destiny" or "standing alone" or something.  Such philosophical nonsense is personally irritating to me.
49. If I learn the whereabouts of the one artifact which can destroy me, I will not send all my troops out to seize it. Instead I will send them out to seize something else and quietly put a Want-Ad in the local paper.  How does anyone who would try to destroy me find this stuff out?  Lets just hope that they aren't reading the local paper, or find out that I won't have any of my troops on their way to secure it.
50. My main computers will have their own special operating system that will be completely incompatible with standard IBM and Macintosh powerbooks. There's enough problems with all of these different operating systems alone without creating a completely new one.  Just use either of the other ones, being more careful with the security.
51. If one of my dungeon guards begins expressing concern over the conditions in the beautiful princess' cell, I will immediately transfer him to a less people-oriented position.  The guard may have a point, making sure that the princess would not be too miserable with the conditions; and therefore would be less likely to attempt escape behind my back.
52. I will hire a team of board-certified architects and surveyors to examine my castle and inform me of any secret passages and abandoned tunnels that I might not know about.  This is a good reason to construct your own castles, rather than move into one that has unknown areas to it (hmm, I wonder if the blueprints to Mr. X's castle had any secret areas to it?).
53. If the beautiful princess that I capture says "I'll never marry you! Never, do you hear me, NEVER!!!", I will say "Oh well" and kill her.  I wouldn't want to get hitched with somebody like her anyway; even villians understand the foundations of a successful marriage.  But why kill her, when you still need live bait for some twit who might be on his way to save her?
54. I will not strike a bargain with a demonic being then attempt to double-cross it simply because I feel like being contrary.  The key word is "attempt"; if you're going to double-cross someone, make sure that they can't do anything about it.  Personally, I don't like dealing with demonic beings to begin with, they almost always have an angsty or gothic vibe that just irritates me.
55. The deformed mutants and odd-ball psychotics will have their place in my Legions of Terror. However before I send them out on important covert missions that require tact and subtlety, I will first see if there is anyone else equally qualified who would attract less attention.  Who's to say that these guys aren't capable of stealth?  There are quite a few psychotic stalkers out there, you know.  And deformed mutants usually hide from being seen by the judging eyes of the general public; so they would have some decent covertness as well.
56. My Legions of Terror will be trained in basic marksmanship. Any who cannot learn to hit a man-sized target at 10 meters will be used for target practice.  Hitting the targets of mans is important, but the actual man will be moving, hiding, and fighting back. Another way of looking at this is having a combination of some acting as marksmen, while some shoot to surpress enemy fire.
57. Before employing any captured artifacts or machinery, I will carefully read the owner's manual.  I also found out the hard way that you can't read instructions while you're using the captured contraption.  Nobody really allows the patience while this is being done.
58. If it becomes necessary to escape, I will never stop to pose dramatically and toss off a one-liner.  Usually in these types of situations, a person only has enough time to do only one of these anyway.
59. I will never build a sentient computer smarter than I am.  I don't handle the artifically intelligent beings, that's Tenecha's department.  Just remember, there's no need to build anything that is free-thinking if it's programmed good enough to begin with.
60. My five-year-old child advisor will also be asked to decipher any code I am thinking of using. If he breaks the code in under 30 seconds, it will not be used. Note: this also applies to passwords.  See #12
61. If my advisors ask "Why are you risking everything on such a mad scheme?", I will not proceed until I have a response that satisfies them.  That doesn't seem very productive.  Proceed with the mad scheme now, come up with a reason later.
62. I will design fortress hallways with no alcoves or protruding structural supports which intruders could use for cover in a firefight.  The reason that these are used is because when my soldiers are both in front of and behind the intruder, This person will duck or something and they end up shooting each other.  With the areas used for their suppossed cover, my guys will be more likely to shoot at different angles at the intruder.
63. Bulk trash will be disposed of in incinerators, not compactors. And they will be kept hot, with none of that nonsense about flames going through accessible tunnels at predictable intervals.  Garbage is garbage, so it shouldn't matter how it is disposed of.  However, one thing about the incinerators is that the flames can be at predictable intervals, but the tunnels shouldn't be accessible.
64. I will see a competent psychiatrist and get cured of all extremely unusual phobias and bizarre compulsive habits which could prove to be a disadvantage. Not suggestable, since your mental abnormalities are probably what got you into the evil overlord business to begin with. These guys might also talk you into not being evil, and you would have to deal with other related anxieties.
65. If I must have computer systems with publically available terminals, the maps they display of my complex will have a room clearly marked as the Main Control Room. That room will be the Execution Chamber. The actual main control room will be marked as Sewage Overflow Containment. Switching around room names isn't the smartest idea, because people who are supposed to know which is which might not.  I tried it once and before I knew it, the control room became a giant septic tank.
66. My security keypad will actually be a fingerprint scanner. Anyone who watches someone press a sequence of buttons or dusts the pad for fingerprints then subsequently tries to enter by repeating that sequence will trigger the alarm system.  So long as no unauthorized people know about the scanner, it should work.  Keypads and fingerprint scanners can both be bypassed by someone who knows the sequence and might happen to have the finger of an authorized person.
67. No matter how many shorts we have in the system, my guards will be instructed to treat every surveillance camera malfunction as a full-scale emergency.  The guards should be kept ready for no emergency anyway, which is what these malfunctions are.  Giving attention to a faulty camera might be what the intruder had planned all along.
68. I will spare someone who saved my life sometime in the past. This is only reasonable as it encourages others to do so. However, the offer is good one time only. If they want me to spare them again, they'd better save my life again.  As soon as anyone saves me, like my supposed bodyguard for example, I'll put this into consideration.
69. All midwives will be banned from the realm. All babies will be delivered at state-approved hospitals. Orphans will be placed in foster-homes, not abandoned in the woods to be raised by creatures of the wild.  I wouldn't keep midwives, or for that matter, babies at all in my realm.
70. When my guards split up to search for intruders, they will always travel in groups of at least two. They will be trained so that if one of them disappears mysteriously while on patrol, the other will immediately initiate an alert and call for backup, instead of quizzically peering around a corner. Not to show doubt in the guards, but who's to say that the backup will be any help if the whole guards-split-up-and-get-taken-out-one-by-one thing happens again.  One thing to do would be to have whatever area this is happening in locked off, since this is where the intruder still is.
71. If I decide to test a lieutenant's loyalty and see if he/she should be made a trusted lieutenant, I will have a crack squad of marksmen standing by in case the answer is no.  This can help or hinder your obtaining of a trusted lieutenant.  The good news is that you will eventually have someone by your side who shows absolute loyalty; the bad news is you may kill off many a lieutenant who are still on your side to do so.
72. If all the heroes are standing together around a strange device and begin to taunt me, I will pull out a conventional weapon instead of using my unstoppable superweapon on them.  Forget the weapons, I'm just going to run up there and smack them around myself for that bit of insolence; or use a weapon, either way.
73. I will not agree to let the heroes go free if they win a rigged contest, even though my advisors assure me it is impossible for them to win. Of course you don't promise them their freedom, because you're supposed to have lied.  If a contest is rigged correctly if the hero can in fact, not win.
74. When I create a multimedia presentation of my plan designed so that my five-year-old advisor can easily understand the details, I will not label the disk "Project Overlord" and leave it lying on top of my desk. At least the disk should not be labeled.  For me, the only way I could put the disk in my own desk is to clear out some of my magazines, and that might be even worse for someone to find.
75. I will instruct my Legions of Terror to attack the hero en masse, instead of standing around waiting while members break off and attack one or two at a time.  Again, this brings up the fact that soldiers are more likely to accidentaly hurt each other, or allow the hero a better opportunity to escape from them.
76. If the hero runs up to my roof, I will not run up after him and struggle with him in an attempt to push him over the edge. I will also not engage him at the edge of a cliff. (In the middle of a rope-bridge over a river of molten lava is not even worth considering.)  First, consider whether or not the hero can defeat you without having the factor of such a peril.  If they can't then don't go into these situations.  But if they can, then do it, because they would try to defeat you by fighting clean, and not getting the idea to push you over until you try the same first.
77. If I have a fit of temporary insanity and decide to give the hero the chance to reject a job as my trusted lieutentant, I will retain enough sanity to wait until my current trusted lieutenant is out of earshot before making the offer.  I'm no psychologist, but I don't think that many heroes accept these types of offers anyway, so don't bother to ask them, whether or not the current trusted lieutenant is around.
78. I will not tell my Legions of Terror "And he must be taken alive!" The command will be "And try to take him alive if it is reasonably practical." Usually they willingly come alive, almost as if they want to be taken to my base...
79. If my doomsday device happens to come with a reverse switch, as soon as it has been employed it will be melted down and made into limited-edition commemorative coins.  I would question this step for the following reason: most doomsday devices are not built by people who would be against using them, so why would there be still be a reverse switch on it?  Also, I would rather commemorate my evil plan with the device I did it with, not coins.
80. If my weakest troops fail to eliminate a hero, I will send out my best troops instead of wasting time with progressively stronger ones as he gets closer and closer to my fortress.  It is better to send out troops at progressive intervals to determine the skill of your adversary to better develop battle strategy.  If for some reason your enemy defeats your best troops, consider yourself shafted.
81. If I am fighting with the hero atop a moving platform, have disarmed him, and am about to finish him off and he glances behind me and drops flat, I too will drop flat instead of quizzically turning around to find out what he saw.  Don't forget that either way, the hero may have just given himself an opportunity to pose a threat again.  There may have been nothing around; but you have still allowed the hero to either take you out with a low blow or attack you while you're not looking.
82. I will not shoot at any of my enemies if they are standing in front of the crucial support beam to a heavy, dangerous, unbalanced structure. The only time to do this is if the intent is to get your enemy with the structure falling on them.  Even then, you may want the comically small parasol to shield yourself from being in the way of the structure as well.
83. If I'm eating dinner with the hero, put poison in his goblet, then have to leave the table for any reason, I will order new drinks for both of us instead of trying to decide whether or not to switch with him. To be honest, I wouldn't poison the drinks to begin with since this problem would occur.  All I'd be doing is using up the beverages, unless I'm giving the hero the cheap stuff.
84. I will not have captives of one sex guarded by members of the opposite sex.  Oh come on, like hormones can interfere with someone's duties?
85. I will not use any plan in which the final step is horribly complicated, e.g. "Align the 12 Stones of Power on the sacred altar then activate the medallion at the moment of total eclipse." Instead it will be more along the lines of "Push the button."  Ah... now you're speaking my language!
86. I will make sure that my doomsday device is up to code and properly grounded. An important tip to keep in mind, especially when you consider how many obstacles that will be in the way, let alone the reliability of your  doomsday device.
87. My vats of hazardous chemicals will be covered when not in use. Also, I will not construct walkways above them.  Covering the vats would be a waste of time.  If there are walkways overhead, I'm sure they would have railing, so people would be more careful.
88. If a group of henchmen fail miserably at a task, I will not berate them for incompetence then send the same group out to try the task again. I'll only send them out again since this group would have experience with the task; along with some reinforcements.  After this, then I'll send out a stronger group of henchmen to complete the task.
89. After I captures the hero's superweapon, I will not immediately disband my legions and relax my guard because I believe whoever holds the weapon is unstoppable. After all, the hero held the weapon and I took it from him.  The key to this isn't so much the possession of the superweapon, as it is who uses the superweapon.  If the hero used the superweapon, then I probably wouldn't be around to take it from him.
90. I will not design my Main Control Room so that every workstation is facing away from the door.  My minions would lose a portion of their concentration on the door when they could be working more productively otherwise.  And besides, thats what the guards are for.
91. I will not ignore the messenger that stumbles in exhausted and obviously agitated until my personal grooming or current entertainment is finished. It might actually be important.  This is sometimes true, with the messenger bringing relevant information, and all that.  And one thing that most evil overlords should be able to do is multi-task; listen to what they need to tell you while getting your grooming and entertainment.
92. If I ever talk to the hero on the phone, I will not taunt him. Instead I will say this his dogged perseverance has given me new insight on the futility of my evil ways and that if he leaves me alone for a few months of quiet contemplation I will likely return to the path of righteousness. (Heroes are incredibly gullible in this regard.)  Not too bad of an idea, though it does lose it's effectiveness if you attack or something the next day.
93. If I decide to hold a double execution of the hero and an underling who failed or betrayed me, I will see to it that the hero is scheduled to go first.  Perhaps doing both at the same time would be an acceptable alternative.  If it were me, killing the hero first would kind of ruin the suspense, and killing the underling wouldn't be as enjoyable.
94. When arresting prisoners, my guards will not allow them to stop and grab a useless trinket of purely sentimental value.  A good way to test this is by first saying that you won't allow them to take the foreign object.  If they should protest this, or increase their defiance by a noticable amount; then make sure that the object is not in their possession, or left around for anyone else to take.
95. My dungeon will have its own qualified medical staff complete with bodyguards. That way if a prisoner becomes sick and his cellmate tells the guard it's an emergency, the guard will fetch a trauma team instead of opening up the cell for a look.  You're not supposed to feed the people you've captured, or tell them your evil plans, but you can have a ready medical staff waiting for them.  I just don't get it...
96. My door mechanisms will be designed so that blasting the control panel on the outside seals the door and blasting the control panel on the inside opens the door, not vice versa.  To save a lot of time and trouble, blasting the control panels should not affect the doors at all.  The doors open and close when you press the button, but somebody always has to go around blasting everything, don't they?
97. My dungeon cells will not be furnished with objects that contain reflective surfaces or anything that can be unravelled.  This comes back to the part about what kind of convienences you are providing your captives; what with what the standard cells are actually being furnished with.  Another consideration is that your dungeon cells shouldn't be escapable through the use of reflective or unravelled objects.
98. If an attractive young couple enters my realm, I will carefully monitor their activities. If I find they are happy and affectionate, I will ignore them. However if circumstance have forced them together against their will and they spend all their time bickering and criticizing each other except during the intermittent occasions when they are saving each others' lives at which point there are hints of sexual tension, I will immediately order their execution.  I think I'll just send them to the competent psychiatrist instead.  They might unwittingly tell what their intentions are, or work on fixing whatever problems they are having; allowing for more time for whatever it is I'm doing that just happens to be evil.
99. Any data file of crucial importance will be padded to 1.45Mb in size. If this cannot be done, then at least don't leave any disks around for the data files to be copied to.
100. Finally, to keep my subjects permanently locked in a mindless trance, I will provide each of them with free unlimited Internet access.  Oh yeah right, like the internet has that kind... of... hyp..no..tic... con..trol...