Use these to motivate you to finish an assignment or complete a study session. Do not allow yourself to enjoy these until you have earned them. This will help you to finish what you had planned in the time allotted and the rewards will seem that much sweeter. Realize that there are fixed comittments over which you have little or no control. Arrange the rest of your week around these.
Living takes time.
Schedule all the things you need to do in order to function. You need to block off the times you will allow for recreation. Watching movies, shopping at the mall, going out with friends, etc., need to be planned ahead. It's usually easier to get through several days of school work and classes, when you know that you have something fun to look forward to on the weekends. It will be easier to say NO to last minute, unplanned time-wasters, if you know that something better is coming up.