What are some random pieces of advice you'd give college-goers?

I heard my teacher say the other day that “I don’t know – you should look it up” is teacher-speak for “Shut up, because I’m done talking with you now”. There are absolutely no books that will have that token of advice, but there should be. I also heard one (not about college) about not wearing shorts during summer months if you’d be riding buses.

What advice would you give college students that you wouldn’t necessarily find in a book or a general guide to doing well (so not “study and get lots of sleep and try not to binge drink”)?