I was very much the same for high school and some of the lower-level bio courses in Undergrad, but the further I've progressed in my academic career the more I've had to alter my study techniques.
One of the things that has helped me is rewriting my notes-partially because my handwriting is chicken scrawl and virtually illegible when I'm writing quickly, but also because I can add to it from stuff I've read in the textbook, reorganize my notes as needed, and also the act of writing it down helps commit it to memory.
However, I don't see this tactic working in the high-volume atmosphere that is veterinary school (bummer), so I'll move on to plan B - re-reading notes extensively.
VMRCVM provides printed notes for some of their lectures. I intend to use these and annotate them to my heart's desire, and then make a habit of reading through the material on a regular (as in, at least a few times a week) basis. This is how I've had to get through some of my current classes in UG.
Also, explaining the material to someone else has always helped me. I live with a non-science roommate currently so my poor rabbit has born the brunt of this technique, but just the act of organizing my thoughts enough to speak about them has really helped me process information.
Granted this is all coming from an undergraduate, so take it with a grain of salt.