Although you can't really do anything about it, normally the attractive woman lives through the movies, and maybe the handsome man that loves her (though that's about 50/50 really). But here's something that you can do: When dealing with a killer that uses traps, have everyone else do things while you lie on the ground in an area that won't get you killed. I've seen more then one movie where someone set off the trap, and it activated somewhere else and killed another person.
Also, if the guy seems nice, he's likely the killer.