In the world of AP your main goal is to be successful. To be successful the main thing you have to do is .... work hard. As long as you give it all you've got then you will be fine. If you do the homework, listen, get involved in the discussions, and study you'll do great. Even if you slack (we all do sometimes) you can still get back on track in a hurry. Even if you bomb a test or an essay you can still get back up, dust yourself off, and be back on the road to success in no time!