Here's the routine in a nutshell:
1. talk to as many girls as possible, utilize every chance you get
2. look for patterns and pay attention to what seems to work well for you
3. when you get stuck come here and ask questions that are more specific
Just like any other skill it's all about practice. If you're looking for something more in-depth then there are already hundreds of books, videos, and audio lessons suggested on these forums. Search around a bit.
The suggestions above are great too. Mystery Method is a good place to start if you want to learn a general "routine" for seducing a girl since it breaks it up into stages. It will probably completely change the way you understand women.
http://www.amazon.com/Mystery-Method-Be ... 383&sr=1-1