Get the used textbooks online (learned this one this summer from my cousin in college)
Ditto on the go to class. I once sunk an A into a C because I didn't attend half the classes and the prof took attendence and deducted for each class you missed.
Don't binge drink. No one needs 10 shots of anything. Don't drink and drive or drink and dial., one can kill you the other one can embaress you for years. If you go to a party in a group, leave in the group. Don't leave any girls behind at a party. Just because you go to college with someone or live in the dorm near them, does not always make them a trustworthy person. Lock your dorm or apartment doors.
This is your time to try something new. I was a yearbook editor. I ran a blood drive and a CPR training day. I worked at various jobs. I volenteered at a nursing home and a home for mentally retarded adults. I worked on an all night telethon and made it on TV a few times. I made a snow statue. I played broomball. I slide down hills on meal trays.
I had a great time.