The key to my passing grade was shifting my focus from the PrepCast modules to the Exam Simulator. The PrepCast was helpful in providing me with the base knowledge, but the Exam Simulator was critical in getting me prepared for the actual exam. I focused on taking daily quizzes (either timed or learning modules), and spent each day taking a few each morning. My grades on the quizzes fluctuated from 50% to 80%, so it kept identifying areas that I needed to learn/improve on.
I highly recommend both products, and I would emphasize that the Exam Simulator is vital to use.