Be creative in the dining hall. Flip-flops become as important as soap, shampoo, etc. You will never find so many excuses for a bucket. Make sure your alarm clock has back-up batteries. Duct tape heals all wounds.
Showers become less important.
Sleep becomes more important. Two meals a day are standard. If the lecture hall is big enough, get someone else's notes. Your bill in the bookstore will almost equal tuition. Labs used to be fun.