I am scheduled to take the AAP (Accredited ACH Professional) certification test in October and I'm beginning to get a little nervous since the pass rate is only 65%.

I know this is a bit removed from compliance, but I was wondering if anyone out there has taken the test and might have some suggestions for preparation.
Our local ACH organization has offered to organize a study group but since there are only 4 in my area scheduled for the test, I don't know if this will happen.
Any help anyone can offer would be greatly appreciated!