One of the most important tasks from the "print" book, AIM YOUR BRAIN® at USMLE Step 1--The Ultimate System for Mastering Multiple-Choice Exams by Dr. Miller, is how to make a F.A.C.T.O.I.D.® Book. F.A.C.T.O.I.D.® Books contain "Frequently Asked Concepts To Own In Depth" that help you convert your weak knowledge areas into concepts your brain can retrieve easily during multiple-choice exams.