you should be filing quarterly , make sure you are, that helps the april tax day burden
Write off dinners with clients that you discussed busisness with, or pitched work, I used to take the receipts and write on the back a little "who, when, what" so I know for later on.
Keep a mileage book for your vehicle, that way you can write that off.
Office, office supplies, car work, heck I bet you could even write off your suits, but I would check with your accountant on that one.
The main thing is documentation just in case you get audited, having your ducks in a row helps, its a pain but in case it happens it will be worth it.