Im about to start study for the DAT...

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.
Most people on here recommend:

Start with Kaplan DAT Book

BIO: Cliff's AP Biology
CHEM: Chad's Videos, DAT Destroyer
OCHEM: Chad's Videos, DAT Destroyer
QR: Math Destroyer
PAT: Crack DAT PAT

For practice tests: Topscore (most accurate) and Achiever (harder than real thing)

A sample 8-week study schedule is stickied on the DAT page.