If you see anyone with an axe, chainsaw, hook, or machete, don't go and see who it is. Run away.
If it is Friday the 13th, Halloween, or prom night, go into hiding.
Never visit a town with a mental asylum or summer camp. If you live in the town, move.
If for some dumb reason you are camping in the woods, don't wander off to go pee in the middle of the night. Hold it until morning.
Books in latin or any ancient language should never be read aloud.
When you find an unusual object or artifact, don't try to figure out what it is. Unless you want to be transported to hell, or want to release ghosts, demons, and other evil spirits.
If you're running from the monster, expect to trip or fall down at least twice, more if you are of the female persuasion. Also note that, despite the fact that you are running and the monster is merely shambling along, it's still moving fast enough to catch up with you.
Never be with the group who plays vicious pranks on the shy strange new kid, those pranksters will soon meet their doom and often in a horribly gory way.
When you have the benefit of numbers, NEVER pair off or go alone.
Never babysit. There are enough babysitter-in-danger-thanks-to-a-stupid-killer flicks out there already.
Never say "I'll be right back" if you have to leave. You will not come back.
Never say "It's all over." Something else will always happen.
Avoid bars and clubs that are only open from dusk until dawn.
Don't open strange canisters with government labels.
If a doll starts talking...RUN!