Your college tuition pays for a lot of things other than just your classes, take full advantage of them. If you get sick, don't just tough it out, go to your college's health center. Go to the gym, you're paying for it whether you go or not, might as well get some use out of it.
Don't buy books for your classes in advance. Always go to the first class, and see if you will actually need the books or not. A lot of professors will put books on your syllabus where you'll only need like one chapter, or won't actually ever use them at all.
Remember, this isn't high school, you can schedule your classes whenever the hell you want. I personally liked to give myself a 3 day weekend. It really helps to give yourself a full free day, rather than just giving yourself some extra time here and there.
If you have professors who don't treat their students like adults get the fuck out of their classes, those people are a nightmare.
That's about all the advice I have, you know, other than the standard "work hard and don't drink too much."