Most useful tools besides the PM PREPCAST, were the full length 4 hour online simulation practice exams where you can find explanations for the correct and wrong answers. There are several free exams as well as ones you have to pay for, simply do a Google search. PRACTICE, PRACTICE, PRACTICE! Best of luck!
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®