Method acting involves becoming so part of your character that you don't need to think about anything else when you're performing. For instance, to get into character for a real-life character, you might read all the biographies available on that character. After putting together a picture of how they spoke, walked, and dressed, you would begin mimicking those mannerisms and layering them into your performance. At first it would be technical and mental, but eventually it would hopefully become natural.