(Note, this is mostly about food. But yeah.)

1. Computers crash. Backup by emailing files to yourself frequently. If possible, go analog.
2. Stress eating is bad. Do not eat too much. Do not indulge yourself with the excuse that it's finals week and you are stressed and you deserve it. You *will* fall asleep. That is bad.
3. Stress eating is bad. Do not supplement your low energy with massive amounts of sugar. For example: *three* chocolate bars in one hour is most likely going to turn you into a train wreck that happens to laugh like a hyena, for no reason at all. Chocolate is meant to be savored, not inhaled. Think Charlie's amazing portion-control pre-Golden Ticket.
4. Do not eat chocolate if you're actually planning to sleep at a decent hour
5. Laugh at yourself for actually thinking that sleeping is even a possibility. Oh, the naiveté.