Sleep schedules tend to be irregular, and roommates often want to sleep at different times. Food, caffeine, and cigarettes, all intended to keep one working on that paper, also keep one awake when the paper is finished and you want to sleep. Some students can't fall asleep, some sleep fitfully and some wake up too soon and can't get back to sleep. Sleep promotes daytime alertness and the ability to concentrate and focus. All are necessary to function effectively as a student.
Most adults sleep between seven and eight hours a night.
Sleep studies have indicated that some people function well on five hours of sleep while others need as much as nine or ten hours. What is important is that you figure out what your sleep needs are. To find out, try to determine your own sleep pattern. You should feel sleepy about the same time every night. Both the quality and quantity of sleep and wakefulness are important.