Don't bother with the Kaplan review class. It sucks! It didn't help me in the least. I got my money back after taking it not only due to the fact that I didn't pass my first time, but I just think Kaplan doesn't help. The way I am preparing for taking it this second time is to go through my Saunders review book and answering all the question. Saunders is the most like the NCLEX because they break the questions into the same sections as the NCLEX does. Make sure you have your medical dictionary and med book handy when you answering questions that way you can look up words and drugs you don't know even though you won't have them with you during the test it helps you memorize and reclal things better. My advice is just to answer answer and answer questions. Also remember to read the rationale for why the answer is the right answer. Oh and don't forget about doing the CDs that come with the books because when you answer them with a pencil in the book when you get to the computer it's different. Do BOTH!
I wish you the best of luck and let us know how you did!