Step 1: Tease.
First of all you need to find a girl and attract her which is shown step by step here.
The best way to come up to a girl is to ask a question or as for an opinion not just say "hi". The reason for this is because if you just say hi the conversation goes no where, but if you say something like, "Me and my friend had a little argument earlier about whether girls lie more than guys and "I know its obviously girls"(this is the kind of teasing that will get the girls attention) but i wanted your thought." Then escalate from there and stay on your toes if the conversation goes dry and after maybe a minute or two say, "Could i have you email?" if she says yes then 1 point for you if she says no say, "Oh my good friend has this band i think you would like his music so i was going to send some of his stuff to you." If she says no at first if she ends up giving you her email, do not contact her and make up a fake friend. Abandon all hope, with that girl, there are many more...just look around you.