1) In "found footage" horror movies, where the camera is actually being held by a character in the movie, I think you'd probably surprise more people by now if you didn't have the camera-person die horribly at the end, usually right as they discover something shocking. (e.g. "Cloverfield", "The Blair Witch Project", "Quarantine", "The Zombie Diaries" (three times in that film), and others.)
2) It does not make your zombie movie a new and different zombie movie if your cast of characters is trapped in a different location than a farmhouse. Ripping off "Night of the Living Dead" is ripping off "Night of the Living Dead", no matter where they're trapped. (Putting fast zombies in was innovative...twenty-five years ago.)
3) Cell phones exist. Please get used to it, or else set your movie in an era where they didn't. Constant refrains of, "Oh, no! My cell phone doesn't work!" get old, fast.
4) There is a small, but significant difference between "the serial killer is very intelligent and has a good knowledge of his target's behavior" and "the serial killer has a precise understanding of every conceivable event that will unfold over the course of the movie, right down to minor and inconsequential acts of chance such as the way water flows down a drain." (See the first "Saw" movie, which would literally have been five minutes long if the killer's taunting gambit had played out even slightly differently.)
5) M. Night Shyamalan. Really, who does this man have pictures of?