Step #1
Talk to her first of all, she's not going to come running to you.
Actually care how you appear, wear cologne, WASH YOUR HAIR (with conditioner), and dress nicely.
Step #2
Get to know her better, ask her questions like, "Do you like any sports?" or "What's your favorite color?", don't go straight for the jokes or pick-up lines.
Add her on Facebook or a social networking website, and say, "Hi" and "How are you?", and all that good stuff. (NOTE: If she's intellectual, use grammar, that's a major turn off right there.)
Step #3
Ask her to hang out somewhere like the ice rink, or go bowling.
Have fun, do activities (not loveually), hang out with her and her friends.
You should most likely be good friends at this point.
Step #4
Go for it, ask her to if you want to go out sometime, go catch a movie. If she says no, wait longer.