[Shuie]

If you already know theory then its a question of practice. How much time do you have?

I learned with a method similar to what Nostatic described. Then I went backwards and learned some theory. It doesnt mean I know anything significant, but at least I can learn to play most of what I want proficiently by listening to the song or getting a book. Most of the time Im happy just sit down and do finger exercises or noodle around.