When I took this course my teacher sucked, assigned almost no homework, and didn't really explain the material well in class.
I "aced" the course (5 on the ap test, 800 on the SAT subject test) by doing several things:
-Reading through each chapter (duh)
-Paying special attention to certain diagrams (molecular geometry, certain lab-style diagrams for things like electrochemistry/gas laws)
-Memorizing what needed to be memorized (polyatomic ions, solubility rules, maybe a few things relating to colors of solutions)
-Doing all the odd problems at the end of the chapter until I felt I knew it well enough to move on to something else. (Work problem, check answer, if wrong figure out why my answer was wrong, repeat.)
So yeah, your textbook is your friend. I didn't find many of the concepts in AP Chemistry really difficult to understand (except hybrid orbitals... dear god) so for me it just boiled down to being aware of all the different types of questions that could be asked about a certain topic and understanding the procedure for working out all those problems... then some conceptual things, but that's all easy anyway.
Good luck!