I'm a 1L now. I didn't do the prep books prior to law school, but I used the actual BarBri bar review books to get ready for finals last semester. Tremendously helpful in breaking the black-letter law down to its bare essentials. Pepper that business with your professor's idiosyncracies, and tests get much easier.
Can you tell me the EXACT names of the books you used? Their publication date would be helpful also. I'm deciding which type of book to buy.