First of, hallways are chaotic. Kids aren't afraid to bump into you, especially the big ones. Be careful to stay on the wall when walking, but watch doors for kids coming out. Never put your head down, if you do, the next thing you know is your running into a jock and your in a can(Jokes, don't take that seriously, but don't run into the football players.)
Find a kid in front of you, and follow them as far as you can without getting lost, if you do, you have less chance of getting hit.