Become a member in student Web forums like studentdoctor where there are discussions and information sharing done by novice dental students like you. It will help you decide what kind of preparation suits your style. The forum also carries a classified section for selling and buying DAT study guides.
Consider buying DAT preparation material in the form of software or books provided by Web sites like Amazon and Scholar Ware. Make sure that the content reflects the four tests of the DAT, which are survey of natural science, perceptual ability, reading comprehension and quantitative reasoning.
Enroll in classroom programs, private tutoring or online programs offered by institutes like Kaplan.
Familiarize yourself with the four areas of the DAT program, by taking sample tests that are available on the ADA Web site. These help you identify your areas of weakness and understand the format of test battery.