The only problem is, when your a beginner, you follow the rules on calling trump then get Euchred. Sometimes you'll call  number 4 or 5, count on that point from your partner, and not even draw a trick. Not only is this frustrating, it can actually changed a persons mood in a heartbeat. This is why I developed something I call my point system. It incorporates the use of all calling guidelines I have ever been taught, plus all the different crazy things that happen in a real Euchre Game.  All you do to use it is simply count up the number of points as indicated from my chart, for your hand.  These "Points" are essentially the number of Tricks you feel you can take.

1. NEVER count on anything to fly. Too much dependence on the Bowers and Aces will kill you when you need the game.
2. TAKE a chance every now and then. Too many people I know will sit on a decent hand and then will be mad after the hand is over. Yes you may get EUCHRED but you never know.
3. SOMETIMES, never count on your partner to get you a dang thing. When you call it play to win it and HOPE your partner can sneak one in.
4. PRAY when you have to. This does work.
5. DON'T count on anything being buried except the three nines which are not trump.
6. ALWAYS count on being EUCHRED. This way your happy when you get your tricks and make your points.
7. WHEN you know your going to set your opponent, talk trash and make them suffer, because they will when they get you.
8. IF you do have a great hand and what is turned up is not what you want. Act dejected and mad like you holding the "Boat from Hell"( Three nines and two tens). Sometimes your opponents will pass to you believing you are not going to call it. THEN you let them have it!
9. IF the cards in your hand are horrible, don't worry, it will get worse.
10. IF the cards in your hand are great, it will be the last time you'll see one like it again.
11. WHEN you do have a great hand, the other team will call trump, which means you do not have any of that color your hand.
12. WHEN you have a bad hand, your partner calls trump. Of course you have none, but your opponent appears to have a bunch, and they are much more powerful cards than that King-Nine your partner wanted to try.
13. NEVER under any circumstance, allow concealed weapons in the place you play Euchre. (You know how people get)
14. TRY not to keep up with your point count during a game using  BEER or Liquor.  I find your partner may not like this.

Watch what has been played and learn to count cards. I know it sounds easy, but too many Euchre players don't do this. Once you have mastered this step, it will help you know what to play and what will fly. Trust me when I say that this helps get that needed trick. Therefore:

1. Learn to count trump. Remember that there is only 7 trump cards in the deck. See what you have, then think about what the other players may have. In most cases, if you did not call trump and someone else did, remember the chart above. That player feels they have "Three Points". From here you can see if you have a chance for a bump.
2. Learn your opponents tendencies and habits. I know people to tap the back of their cards if they have a Bower without knowing they do it.  Some people smile, or joke when they have a good hand, others always lead the same off suit every time the win a trick.  I also watch others body movements when I play and can pick up their quirks pretty easy,  which I love to use against them. In college, there was a guy who would always talk junk to the dealer every time he led an Ace of Hearts.  I loved to sit to his left and put my trump on top of the card about the same time he played it.  After a while, everyone picked up on his quirk and it became stupidly humorous.
3. Play trump like you MEAN to play trump.  For example, let say you have a Bower and a lower trump card in your hand, and you have a play on the trick.  You  believe your opponent to your left has a mid to high trump car in his hand, then play the BOWER not the small trump.  Why? Because this forces your opponent to make a choice and in turn helps your team see what you have to do to win the hand or stop your opponent. Never forget clearing the table of High trump makes your low trump good.
4. Watch what your partner plays. This is one aspect that I have picked up myself. I know most Euchre "Pros" know this little trick, but for a beginner or intermediate player, this can be hard. Paying attention to what they play can be the difference between a Bump, a Point, or Two points.
5. Do not be afraid to burn a trump card when you can. Make your opponents earn the trick if they go for the set. Too many inexperienced player will hold all of their trump to the end, and they tend to hold onto big trump (King-Right Bower). This to me and the few who taught me is considered a waste of trump. Most of the time when this happens, your partner and you will "Bump Heads", and in some cases will cost you points.

1. If you have the lead and called a risky hand, play a suit you know is going to get trumped, or trump itself. This will help you make your following decisions and can help make your remaining cards "Good as Trump." My mother showed me this little trick at a young age.  She was sitting to my left, had the bid on the hand, and I had the 9 ♦  turned up, while she held  J ♥ J ♦ A ♣ Q ♣ 9 ♣.  After she ordered up the card, she lead both Bowers and as a result, she cleared the table of trump.  Obviously, she then played her  A♣  and when she saw the K♣  played on the hand, she knew her Q♣ and 9♣  would take the last two tricks. Thus she herself received two points for her hand.
2. Play your suit cards in a way to let your partner know if you are holding a possible winning high card. I usually tell people I am teaching that if you have, lets say no trump, but three cards of the same suit with an Ace high, play them in a way to let him know you have that particular Ace. Play your low card of suit when trump is lead. Then if it it lead again, play the next lowest. If they are good, they should know what you have left and can make crucial decisions when that suit is lead on whether or not to play his remaining trump.
3. Find a partner that fits your playing style.  When people say "I like having John as my partner, because we always seem to be able to know what each other is going to play", chances are they have the same playing style.  People who play cards the same tend to be better teammates then two people who play differently.  I consider myself an aggressively-conservative player, or I like to take risky chances when calling trump, but I will not do anything  I deem  crazy, (like order up  the Right bower to an opponent when I am holding a King, Nine, and decent off suit) so I tend to look for people similar to my style of play as a partner.  If I am not comfortable with a person, I have no qualms about  kindly stepping out and looking for someone else. 
4. DO NOT be afraid to Lose! Sure losing stinks, but learn from the loss and make you a better player. Everyone has said "why did I call that" or "I can't believe I didn't see that" or something similar before, but very few actually file that in memory long enough to learn from it. 
5. Never give up or get down on yourself or partner! Once you start to second-guess yourself, you start to lose confidence in your game.  This loss of confidence can break down trust between you and your playing partner.  After the trust is gone, then you are out of the game for good. Remember all it takes is one good hand to bring you back in a game and in euchre, that is always possible. Everyone has bad luck or a gets on a bad streak every now and then, so get over it and move on to the next game.