How to keep healthy when you have all the stress from school or work

This is a really tough week.  All the exams, papers and projects are due at the same time.  It is so difficult to stay with my bed for enough hours.  I started to hate my alarm clock. Sometimes, I even got scared to hear the alarm clock to wake me up.  What was worse, I truly did all the unhealthy things in this week.  I did not go to the gym at all. I drank different types of beverages, especially sodas.  Also, I ate junk food at late night when I was studying for my exams.  Eventually, all the unhealthy behaviors turn out to bad things.  More pimples come out and my weight goes straight up.  I even got a strong headaches this morning after I got up.  I am so annoyed with myself, and I complained all these issues to my friends.  However, this is the life for colleges.  You want to have fun, but you always need to deal with all the school work.  Then I start to think about how I can keep healthy when I get stuck in all the work.
1. Try not to go to sleep too late, then get up earlier to study.  
When you are studying too late, it becomes less effective.  It might took twice even longer for you to remember/ learn the same materials. Instead, try to get up earlier to take a shower to make you awake, then go ahead to study.  At least, it works more effectively for me.

2. Eat some fruits instead of junk food as late night snack.
It is so reasonable to eat snacks when you are studying at late night.  But choose wisely!!  Fruits are more healthy, even though junk food is yummy!  :(

3. No time to work out?  NO!!
It is really difficult to go to the gym when you are in the exam weeks.  I prefer to take a nap rather than going to the gym.  So what can we do?  I guess we can take advantages over small time to do a little bit work out.  Walk to the campus instead of driving or taking the school bus, if your place is not too far away from the school.  Use the stairs instead of taking the elevators!  

Please let me know if you have any other ideas!!

Danlu