This one came from a Y-chromosome carrier as well (you’re going to the University of Illinois, you should be smart enough to know what that means), but making scrapbooks is a creative way to document the good times so far.
I am also told they make great gifts for friends — cheap but great keepsakes no less. Give them to your friends as going away gifts and continue to make them throughout college. Photographs are a great way to capture the moments you won’t remember but will never forget (awww) and keeping them in a scrapbook will make them that much more enjoyable to go through.