But sometimes you can't afford not to take a break. If you return refreshed, you will get more work done in the long run. Try to exercise. If you're feeling down, it can be really hard to motivate yourself, but it can work wonders. Run, dance, swim, ride a bike.
Many choices are available through physical education, club teams or recreational facilities .
Try starting a journal. Write things in it that you can't tell anyone. Do something nice for someone else. Write to a past high school or MIT instructor and tell him or her how much a class meant to you. Send someone you love flowers or a nice card for no special reason.