Your timetable should have separate time for eating, playing games, exercise, reading newspaper and study materials. You should not only make a timetable, but also should stick to it. Give priority to leisure and games in the afternoon, but separate early morning time for studies. Make sure you read all the class notes before you go to bed. While allotting time to different subjects, allot more time to difficult subjects. You need only less time for the subjects that are easier for you to learn.