In addition to the study guide and the book(s) by ARCO, I simply went to my local Barnes and Noble. I reviewed high school math concepts (algebra, geometry, trig, etc) to help w/ the first section of the test. The ARCO books will help w/ the airplane attitude/direction diagrams. I looked through a few Nautical books for boat/ship knowledge. Some entry level physics books might help w/ the Mechanical section. All in all, the study guide helps the most. Memorize it and make sure you understand how to arrive at the answers. Hope this helps.