If you don't you'll forget until the night before it's due and be up until 4am. Your TA's and professors get paid to hold office hours, use them. Don't play networked games the night before a test. Even if you don't think it's worth it, make a resume sometime your first year. Then, later on, you can just update it quick when you need it, instead of spending a lot of time in a rush.
Quarters are worth their weight in gold.
If you think an answer you got wrong was right, argue it. But, be prepared to back up your claim, especially using the book. If you can make a valid argument for why your answer was correct, you can usually get the points. Granola bars are your friend. Join lots of clubs, everything you're interested in.