<p>Both of those exams are very heavy on applying concepts, so do as many practice problems and old Free Responses as you can find. </p>
<p>For Computer Science, you could start with JKarel. It's a great way to get your feet wet with Java. I don't know where you can find it though. However, the AP test also has the Marine Biology Simulation, so I don't know what you can do about that besides talking to the computer teacher at your school. </p>
<p>For Calculus, practice, practice, practice. Find someone who already knows calculus to explain difficult concepts to you. I also recommend the Thinkwell software (<a href="http://www.thinkwell.com%5B/url%5D">www.thinkwell.com</a>) for an audio-visual aid (includes BC topics as well). Remember to do practice problems as well. I really can't stress that enough. I only watched the lectures and neglected to do all the problems, and I ended up having problems trying to figure out stuff on the AP Free Response. If you start now, I think you'll be able to succeed on both tests. Good luck!</p>