Buy a review book at the beginning of the year; it really helps
Also check out the AP questions and answers I posted below.
Mr Morgan gives these out before the AP but they're good for
his tests since his are all just basically AP questions.
Globalzona has review also.

AP CHEM LABS:
001 Percent Cu of Penny
002 Aspirin Prep
003 Aspirin Melting
004 TLC Lab
005 Standardizing a Solution
006 Reactivity
007 Redox Titration
008 Eudiometer: Mg
009 Eudiometer: Butane
010 Graham's Law
011 Hess' Law
012 Magnetism
013 Laws of Multiple Proportions (or something)
014 Heat of Vaporization
015 Anhydrous CuSO4
016 Freezing Point Depression

AP Questions:
DOWNLOAD Ap questions
This ZIP file has:
-Part II questions by unit from many APs
-the 1984, 1989 and 1992 part 1 questions