Just saying Friday the 13th sends a chill down my spine. I'm glad it doesn't come around that often. One thing is for sure, I make sure never to babysit when it does, just to be safe. No matter what your plans for tonight are, at some point you will be perusing the horror section of your local buster.
To make your movie selection easier, I have some suggestions for you.

Now, if you're looking to take a chance on something new I have two categories for you to choose from. The first being creature features. It's a lists of ghosts, goblins, and all things that go bump in the night.

The Uninvited, The Descent, The Haunting, 30 Days of Night, Darkness Falls, Devil, Paranormal Activity 2 , Cursed, Anaconda, Cloverfield, The Relic, The Breed (2006), The Ring, The Lost Boys, Jaws, Snakes on a Plane, The Faculty.
My second category is bad guys. There's only one thing that truly terrifies me, a psychotic killer. The horrible things that people will do to one another is what gives me nightmares. Now, I've broken this category down into 2 sections. First is Carnage Candy, these are the movies that you should not eat while you watch. Second is Super Scary Thrillers, these movies will spook you, but not make you wanna puke.
Carnage CandyThe Collector
Pathology
Vacancy
The Hitcher (2007)
Last House on the Left (2009)
Identity
Texas Chainsaw Massacre (2003)
Wrong Turn Sorority Row
The Highwaymen
Open House
Seven
The Killing Room

P2
Prom Night
Primal Fear
The Watcher
A Perfect Getaway
When a Stranger Calls
Urban Legend
I Know What You Did Last Summer
Joy Ride
Cry Wolf
When Strangers Appear
The Vanishing
Funny Games
And if you're too chicken to watch anything on my lists, try Monster House!