Determine when your high and low periods of concentration occur. Reserve peak times for intensive study. Use less efficient times for less intensive tasks like rewriting notes and recopying or typing assignments. Schedule study times according to class periods and course formats. Study close to the time you are in class.
Some classes take more preparation before class.
Others require review after class. For a class in which you discuss and recite, plan to study just before class begins. For a lecture course, plan to study soon after the class ends. Study in time blocks. Plan 50 minute blocks of study time separated by 10 minute rest periods.