Sinister
It wasn't anything special, but it actually wasn't bad. It was definitely creepy (and very, very morbid) and, while not exactly original, had a very interesting story going for it. It also helped that the main character was likable (his wife, on the other hand, not so much...). There were a few too many jump scares for my taste, but there were a few cool creepy moments as well. If you're into horror, its definitely a film worth checking out.
And I'm not going to lie, a certain scene with a lawnmower kind of made me jump a bit...