First of all, evaluate what you have available to the cats. There is a certain amount of concession that owners must make. Cats are curious, and sometimes in giving something a good once-over they will knock it to the floor. Does your cat rip up the paper towels? Well, they may have to go in the cabinet. You may need to close the bathroom door. Get yourself a squirt bottle for the other things you can't put away.
Cats also apparently hate the smell of citrus fruit. There are plenty of sprays available to deter them from going after whatever it is. This would be good for cable chewers, that sort of thing.
Now, what toys do you have? Do you have a good, sturdy scratching post? Is it horizontal, or vertical? Cardboard, carpet, or sisal? All these options mean that you should experiment until you find a surface and substance that is acceptable and welcome by your cat. Many cats will use this with literally no help. Then, get thin double sided tape - there is some specific to cats that won't damage your furniture, but they hate that sticky feeling. They also hate the sound aluminum foil makes, so if you can stand it spread it on the surface you don't want them hanging out on.
Is there a regular playtime? You can get a lot of your cat's energy redirected if you engage in regular playtime every day. Make sure you have interactive, fishing-pole type toys so that your cat gets the sense of chasing prey. Get them running a few times a day, just to tire them out. Also, make sure there are always catnip and mice and balls and fun things for them to play by themselves and work a bit of that out. The most common complaint is nighttime activity - so have a vigorous play session before you want to go to bed. Remember, cats are nocturnal hunters by nature, and you have to work if you want that to change in your kitty.
Is the cat destroying one person's possessions? The cat has anxiety toward that person. Are they new? Did they accidentally step on the cat? Just like the other behavioral problems that are targeted at one person - that person needs to have positive interactions with that cat. Slowly at first, have that person give him treats, and then feed the cat. You need to associate that person, in the cat's eyes, with positive things.
Finding out the source of the behavior can serve you in halting the behavior. If your cat resents the presence of a newcomer, he'll target either you or the newcomer. You have to move slowly, redevelop your relationship with the cat, or develop one with that new person.