Homework, assignments, projects, submissions..., when accompanied with social life and commitments, makes a student's life really demanding and busy. In balancing both, students miss out on the essentially required eight-hour sleep. The state of being deprived of sleep can lead to lethargy, which will eventually put you in a less productive zone. You might find 'learning' a difficult task. You will feel refreshed and less stressed out by taking proper sleep, which will also lead to more concentration and productivity.