I prepared for the exam by doing all 550 questions (9 exams of about 60 questions each)in CF_BUSTER from http://www.centrasoft.com/ and by doing all the questions from Ben Forta's study guide, all in one day. I had read the BF guide a few months ago.

After each CF_Buster practice exam, I reviewed in detail each item that was wrong. Same for the Ben Forta guide. Be aware that there are some questions in each of these exams which have either wrong answers or misprints... after shaking my head over them, I tested the question and confirmed that the printed answer was in fact wrong. There are very few of those, but it can be frustrating. Next day I walked in to the exam and got 57 out of 60 correct in about 25 minutes.