While I think this generally refers to mechanics, I had an interesting conversation with DD (12YO) on the way to yesterday's tournament. I asked her what she thought about when she is pitching. Fully expecting a response along the lines of "drive my knee up and get my stride foot down quick", she said "I think about what pitches worked well against the batter during their last at bat. If it's their first at bat I watch their swing before they get in the box." I was so surprised I didn't ask her to elaborate. Maybe that will be the discussion on the tournament commute next weekend.