boyced is right! I found out after the exam (from AAPC) that there are always 1 or 2 questions that are easily eliminated as a possible answer. If there is an answer that is in a completely different chapter than all the other answers, eliminate it first. Most likely, it is not an answer. Don't spend too much time on any one answer. That is easier said than done but if you look up an answer, and everything seems correct, just go with it.
Also, write a lot of notes in your books. I was scared to do this because I was "warned" that I would not be allowed to take the exam if I had too much written. This is NOT true, you can write an awful lot in there! Just use your blank pages and any extra space that you can find that will help you quickly. The person looking through your book before the exam is only going to look for any loose or stapled in papers. They do not have time to look through every single page and they won't even try. This is not cheating as you are provided a lot of space in your books for this purpose.
Do not memorize definitions anatomy, you will not be asked questions like that. I wasted a lot of time doing this.
Last but not least, KNOW YOUR GUIDELINES!!! Re-read them over and over again and tab any pages that you use frequently. All of my books are tabbed with the alphabet, code numbers, and anything else helpful to me. And I passed on my first try. Good luck!