Go to the gym and do some exercise, there should be a wellness center at your local college, you'll have FREE access to the gym as long as you have your student ID.
Find books and articles that will help with your research in the library. Use the libraries computer catalog to find exactly what you want to save time.
If you don't know what you want to study get some information from your advisor. They will be able to provide you with information on almost everything about a major that interests you. Remember it's absolutely okay to change your major.