Get a scratching post. The taller the better so that when he is grown he is able to fully stretch when he scratches. Id suggest carpeted over the sisal style. Ive tried the sisal but cats always seem to prefer the carpeted variety.
Consider non-clumping litter as its healthier for the cat. Better yet, consider pine litter or another natural alternative.
http://www.petsmart.ca/cat/litter-an...r-5212425.html
The pine is more expensive but its less dusty for your house and the cat itself.
In terms of damaging things, teach the kitten from a young age. Its hard to get rid of bad behavior once its learned. If you give your cat his/her own toys and play with him/her, then cat will be happy and content, thus much less likely to play with and destroy things that it shouldnt be touching.