There is only 1 way to prepare for dental schools... if you don't do it right, don't bother trying.
Get a book of Biochemistry, Histology, Gross Anatomy, Something psychology related, Dental Anatomy (good one = Concise Dental Anatomy and Morphology), and... okay fine I'll stop its first sememster.
Now for the next 4 weeks, master ALL the following topics (cause you'll have a mid-term)
Now, for biochem, master enzyme chapters (big over-view stuff, don't go into too much details), and proteins (structure / function / enzematic activity) and hit up all of glycolysis, gluconeogenesis, pentos-P-pathway, and some genetic disorders related to all 3 cycles.
For histology, cover the begining chapters about H&E, organells, basement membranes, then do the chapters on.... Epithelial cells and Connective tissue,
For whatever psychology you picked up, know the first 7-8 chapters.
For Gross anatomy (this one sucks), my school started us off with memorizing every bone / bone structure in the body on the first day (160 PPT slide) ~ excluding head bones (thats next term). Then follow it up with all the back muscles, and just 1 nerve innervation for each back muscle (and 1 major blood supply). Then cover the breast, and chest muscles (attachment points, medial & lateral nerve, and 1-2 major blood supply).... and I think thats it.
For Dental anatomy, learn and master the first 4 chapters of that book, this will include ALL the anteriors. All their structures, functions, morphologies, and how they relate to one another (example: the lingual fossa of the maxillary lateral is bigger than the one found on max. central ~ haha if you have Kilgore teeth, thats NOT the case, yep all of us got that one wrong on the quiz)
Once you master this stuff in 4 weeks, expect to have a test, if you can answer 70% of questions right, then your on the right track.
By the way, that was about 70% of 4 weeks of a light-dental semester. The other 30% is lab works, ethics course, etc....