The two best programs I found was DAT Achiever and Crack DAT PAT. The DAT Achiever has 3 full lenght exams that I found more difficult than the real DAT in the PAT and sciences section. Crack Dat Pat helped me go from scoring 17-18 to 22-24 on the PAT. The royal package (I think that was the name-10 PAT test and a whole of extra questions for the Cube counting, angle ranking, and paper folding) is what I used, a bit expensive but it was the best investment I did. For the science section I used the Kaplan review and Schaum's Biology outline (really good for all those questions pertaining to the kingdom's, phyla, etc). Also, make sure you practice your timing for each section to make sure you have a good sense for pacing.
Avoid these products:
1) Barron's How to Prepare for the DAT - I found many errors and there PAT section is way too easy. Only good for explanation of the PAT section.
2)KSF review - their practice test are just horrible (lots of irrelevant material, RC is hard to read due to small print, and the PAT section was just weird).
Test Content:
Sciences - The Kaplan review took care of about 80-90% of the material. If you review the material on the DAT Achiever as well you should be good.
PAT- If you master Crak Dat Pat, again you're good.
RC- I advise writing down key words found in each section, since each paragraph is numbered it makes it a lot easier.
QR- well I wouldn't really listen to anything I have to say. Just don't take that section lightly and pace yourself well. I was overconfident (I scored 18-20 on my practice tests and that may have been my downfall) and lost my normal pace halfway through.
