Leaning on the Fourth Wall: Characters that do this are referred to as "dual citizens". Very often, they're gas station attendants, homeless guys or barflies. If this person starts talking about local urban legends or giving you a grisly lesson in local history (i.e. providing the audience with some backstory), that's your cue to run like hell.
Money, Dear Boy: How do you tell if you're in a sequel? One of the ways is that you have the oddest feeling that you're only here for the money.
Rage Against the Author: The books are basically a guide for how to escape from malicious horror writers who are trying to get you brutally murdered.
Inverted in the preface, in which Wes Craven apologizes profusely to all the fictional characters he's killed off or terrorized in his films over the years.
Recycled IN SPACE!: A horror movie set IN SPACE! is a sign of one of two things. On one hand, you could be in a crappy sequel to a slasher franchise that's jumped the shark, in which case you'll probably survive, since the writers are getting really lazy by this point. On the other hand, you could be in a big-budget alien monster movie, and with those high production values (usually) comes a better script than the average horror movie — and trickier, more inventive writers trying to kill you.
Self-Deprecation: The general low quality, low budgets and clichéd writing that show up in many horror movies (especially slashers) is a frequent target of parody. One of the "ejection seats" is great, well-written dialogue, and another is fleeing to a location that's far too expensive for the cash-strapped producers of a horror movie to shoot in.
Wrong Genre Savvy: If you find yourself in a big-budget production (really?), then odds are good you're in a psychological thriller, not a horror movie. In which case, the only advice the book can offer is that your missing child probably never existed, and that your husband is the bad guy.