Well, in my case, I give full attention during class discussions so I can understand well the topic matter. I also do advance readings on some of my subjects, especially my major subjects. Days before my examination, I don't stress myself on reviewing, I rest my mind for a while before scanning my notes. I also listen to upbeat music, coz it helps the mind to be active and upbeat music tends to make you pick up words faster. I also eat nuts while reading my notes, well, nuts is food for the brain. I also sleep at least 7-8 hours before doing my reviews. It also help to exercise before reviewing, coz it awakens your mind, body and estimulate the blood flow in your brain.