I took it back in 2010. I would suggest that you know the exercise directory book (the thin one with the guy squatting on the cover) - especially the distances for stance and grip on Olympic lifts. You also need to know screening procedures like the back of your hand. Someone comes to you with x, y, and z and you need to be able to pick out the red flags quickly. How long have you spent studying for the exam, if you don't mind me asking?