In addition to Shimmetry's picks, which are all excellent, I would most recommend Absentia and Pontypool from that list, both of which I have banged on about lots on here.
From the other recent stuff, would also check out The Innkeepers, House Of The Devil and Lake Mungo, Willow Creek too if you like found footage stuff. And Shutter is excellent Asian horror if that's your thing.
For 80s madness, Society and The Demons are great. Carnival Of Souls is a stone cold classic in the horror genre and much imitated. How Can Kill A Child is a good 70s period piece.
Oh, and Silent Night Deadly Night because of the time of year natch...