It's important to get enough regular exercise, but plan to do it in the early afternoon if possible. Avoid beverages that contain caffeine , such as coffee or soft drinks, after late afternoon. Try to stay on schedule even if it's a weekend. Don't go to sleep more than an hour later or wake up more than 2 to 3 hours later than usual. Get into bright light as soon as possible in the morning, but avoid it in the evening.
Bright light signals the brain that it's time to wake up.
Say no to cramming for exams with all-nighters. The best way to prepare for a test is to spread your studying out over time and to get plenty of sleep. For specific medical advice, diagnoses, and treatment, consult your doctor.