Oh, wait, there is a method! Lots of wasted paper, lots of muttered profanity at the paper, the pencil, the pen, the desk, the thing that I'm drawing, and the people poking me while I'm drawing, lots of snarky glares, and a great deal of frustration. I yell at my computer a lot, too. And Photoshop- Photoshop earns the Glare of Death repeatedly, and that's how I draw.

Aren't you glad you asked? (what, no one asked? aw, shaddap...)