Make a list of other activities you want to work into your schedule and the approximate amount of time you wish to devote to them. On a schedule grid, block out time for classes and other activities. Now you can see where you have free time. Get your studying in before your recreation. Usually students are able to concentrate for 50 to a maximum of 90 minutes.
Plan breaks accordingly.
Specify the length of your study breaks to keep yourself honest. Don't burn the candle at both ends. You need a good night's sleep to concentrate in and out of class. Give some thought to where you will do your studying and indicate this in your schedule. Also try to find a place to study that is well lighted, ventilated, cool and free from distractions.