Studying from multiple sources
I firmly believe that using multiple sources to prepare for an exam is the way to go. I'm beginning to prepare for my CCNA Security and have the OCG, CBT Nuggets, and INE. In the past I've tried to follow the outline in the book and watch the relevant videos for each topic in the book. That can conuse things in the video series (especially with CBT Nuggets annoying setup requiring hopping around between a few different series). The alternative would be to use each source sequentially (i.e. read the book, then watch CBT, then watch INE). I'm curious how others use multiple sources to study.