I’ll give this more thought at work tomorrow to form a better list of things, but this will have to suffice as I’ll probably forget it tomorrow.
First, I’ve posted a few times how The Ring is right up there in the top 5 and probably the scariest I’ve seen in a few years.
To explain that and the following, you have to know this: I hate scenarios where what isn’t supposed to happen, happens. And happens only to frighten/harm normal carbon-based oxygen converters. Generically ghost stories, but not limited to ghosts.
A few come to mind.
Dolls. Friggin dolls come to life to kill people. :shudder: I’m not talking Chuckie-style dolls. We’re looking at cold, emotionless dolls. Some eerily reminicent of Karen Black. My sisters lost a few Barbies that night. I’m not kidding. I was going Bill Cosby Chicken Heart on them. (Bonus points if you know the bit I’m referring to.) 
The Woman in Black. I started a thread just to find this on DVD. Not many conventional scare scenes, but you’re shown just enough to know there’s a pissed off ghost out to hurt anyone she can. And sometimes the anticipation of a scare can be just as good as something suddenly appearing. Though, that’s covered as well. I’ll never be able to stay at a B&B in London.
Anything with wierd movements. This one isn’t really about movies, just those that have these kind of scenes. Gothika used this technique pretty well in a few scenes. And The Ring was masterful, IMO, showing the deadie crawling from the TV screen.
Also, 2 Twilight Zone episodes come to mind. One was on last night. In that one, a woman was in a dept store to shop for a gift for her mother. Nothing was right about it. Turns out later she was a mannequin given life once a year for a month. I hated when all the other dolls came to life and seemed to follow her too closely before being let in on her being one of them.
The second (I think it was the one where an astronaut was in a sensory deprivation chamber) was a guy that found himself alone in a town, but filled with mannequins. (I wonder if this was a bad year for studios to pay union scale?)
Anyway, none of them came alive, but you just knew that at any minute they could. Eesh.
In the Night Gallery episode The Cemetary, Roddy MacDowall murders his uncle, then watches a painting near the staircase change to show the corpse dig out, walk to the house and knock on the front door, just as there’s a knowck on the front door. A lot like Monkeyshines and the 3 wishes. Good stuff.