Don't dismiss the idea of some kind of summer preparation before considering your own background. For example: I was a physical education major, had been out of school since 1995, and had essentially no science experience other than the barest of prereqs (orgo, gen chem, physics, 1/2 general biology). Not surprisingly, first year has been unrelenting misery simply because EVERYTHING was new.
Next example: unlike myself, a colleague had an extensive biochem/neuro/genetics background and basically had to do nothing in order to honor those classes, leaving ample time to concentrate on anatomy and some other things he was never exposed to. He had no qualms about doing nothing the summer before med school because he already knew 3/4 of the material before entering.
If your science base was as scant as mine and you don't absorb material like a sponge, then definitely do some prep work. Had I realized this last year, that's precisely what I would have done. Consider these words.
