Practice tests are ok. Get examkrackers, barrons, lippincott. All from amazon.com. Get the kaplan stuff up in the air to. Check ebay from time to time on dat stuff.
Whatever you practice, make sure you do some practice computer tests before you take your actual DAT so you are comfortable with doing it on the computer. I took a bunch of practice tests on the computer which were supposed to "simulate" the real DAT and when I got to the center, their version was slightly different from my practice and it took me a little bit to adjust myself.
