I actually found that reviewing the incorrect answers on the simulator and other practice quizzes greatly improved my overall accuracy in getting questions right. I took the time to read through the explanations and understand why I got a question wrong and why the correct answer was "correct". I also used flash cards to help with general understanding and memorization of key terms. If its any consolation, I did not score over 65% on my simulator exams and was still able to pass the exam successfully.
I'm not someone who can just memorize information and regurgitate when needed. So for most concepts, I truly needed to understand what, why, and how it is used.
Hope that helps!