I'm still in high school, but I do a combination of the aforementioned methods; I will try to take note of all of the key lesson information of the day, and later re-write the key points in a separate notebook. I also make flashcards two days before my examinations and use them quite compulsively on the days leading up to testing.
Typically, I study in my room, as I usually receive no distractions from the outside or from the rest of my house. This, however, does depend. I mean, the library is also a fantastic place to study.
When I'm reading an especially boring text, I try to picture the main points of action in my head, just for a little shot of drama. Visualization usually helps me absorb the information at a quicker rate and makes the reading a tad more enjoyable.
I hope I helped you a bit.
The best of luck on your tests!