My advice, at this point, would be to review every moment you can. The first two terms of calculus (which are what AP Calc approximates) are relatively easy, but you need to become familiar with them for that to work. Once you can think with the rules, it will basically all be intuitive. You don't have a lot of time left, so you should be thinking about it around the clock. Even when you aren't studying, play with rules and come up with questions for when you are.