I've heard the hairy hands one-not that I ever had to worry about that, luckily
I think everyone knows the story of Bloody Mary, though I suppose it varies. The way I'd learned was that if you said her name three times she'd enter your dreams, five times she'd kill you where you stood no matter how fast you got to a light. I never tried it.
The light as a feather thing was always pretty big-that and Ouija Boards were always pretty big pre-bedtime scares at parties.
I think sewer gators were pretty big, too. That you shouldn't flush dead pets like gerbils or fish because they fed the gator and just made him bigger and bigger!
Holding your breath when you pass a graveyard was pretty popular. That one was especially unsettling for me because when I was a pre-teen I lived in a very old house, the type that has dead family members in the backyard! It was terribly creepy for the first few months and especially creepy when my friends found out and told me every ghost story that crossed their minds!
One legend about the ghostly hitch-hiker. Man stops to pick up a girl. Drives her home, but when he stops at her address to let her out the girl has disappeared. Man knocks on the door and finds that the girl has been dead several years and that she died in a car accident on the very same stretch of road!
And of course Cokelore: if you eat Pop-Rocks and drink Coke your stomach will explode!