Get your hands on anything aviation related and read it. I would take the advice of the previous poster, it's good. But I would also get a CFI PTS, and study all of the material mentioned in it. AND TAB THE CRAP OUT OF IT (the FAA-8083, etc). Take it into the oral with you and refrence the crap out of it. The one thing about the CFI test is being able to teach it. So refrenceing it is allowed. They are not necessarily testing you flying skills, although it is important. Be able to explain your mistakes in flying, and why it happened. Start flying right seat as much as possible. Read the FOI book cover to cover, and know it. FOI was big on my initial CFI ride. And they usuallly don't allow you to refrence it too much.