It’s very easy to slide into bad habits when you’re living on your own for the first time. From taking the elevator because it’s more convenient to eating doughnuts for breakfast, you have a lot of freedom. Maintaining your physical health is important and not terribly hard to do. Try to get at least seven hours of sleep each night, get regular exercise (anything from biking to and from class to taking the stairs when you could take the elevator), and eat balanced meals each day. If you do get sick or injured, know where to go and have a first aid kit on hand in case you need a quick fix.