I've learned one thing, and that's to quit worrying about stupid things. You have four years to be irresponsible here, relax. Work is for people with jobs. You'll never remember class time, but you'll remember the time you wasted hanging out with your friends. So stay out late. Go out with your friends on a Tuesday when you have a paper due on Wednesday. Spend money you don't have. Drink 'til sunrise. The work never ends, but college does.