Do you know how you learn best? I personally know I learn things visually, so I make up pictures and use lots of colors. Actually, the first time I go through notes, I underline stuff in different colors that mean different things (e.g. bright green = drugs, bright blue = symptoms, dark blue = signs, etc.) Then when I go back over the notes, I can find what I'm looking for much more easily than if I just highlighted. I also try to re-write the notes, then I just do tons of practice questions. Start using review books as soon as you can! I didn't have this method down last year when I did phys, but since I've started, I've done a lot better in classes.
The point is though, if you learn differently, for example by hearing something, then you need to adjust your study habits to incorporate that.