Any suggestions?
Well that depends what kind of advice you're looking for. You didn't really specify. Do you need to know what kind of materials, or topics or study habits or what?
You understand that good (and effective) communication is necessary for this job, right? My school used Gleim products, and broke down the ATP book into a class per chapter more or less. I also used the test prep software to study and take practice tests, many of them, before the actual written.