Step 1:
Scar up your wrists real good. This gives you an appearance of a badass who's been in a lot of knife fights.
Step 2:
Start listening to obscure, antiquated Industrial music and develop a hatred for anything that gets any radio play at all. Throbbing Gristle is a good start.
Step 3:
Always look at the ground and when you have to make eye contact, scowl from under your eyebrows. This will give you an air of mystery.
Step 4:
Wear a black trench coat. Not only is it classy, but it goes great with sunglasses. Chicks love guys from the Matrix.
Step 5:
Make sure to keep Preparation H in your locker. This will demonstrate your maturity to passers by in the hall.
Step 5:
If you like sports, STOP IT and if you really don't care, turn that apathy into hatred. Refer to the other students at your school as "jocks" and "conformists". Girls aren't interested in another clone football player. They want the mysterious badass in the corner who can tell them how wrong they are about everything and turn them on to the greatness that is Skinny Puppy.
Do these things and you will be a king among men!