Visualization: visualize each pitch traveling along the intended path, having the intended movement (if any) and speed, and hitting the intended spot.
And here's something to think about... If the other team thinks you're on, they may be less confident at the plate. But if they think you don't have your best stuff, their confidence goes up. Losing your composure sends the wrong message to the other team and boosts their confidence. Don't help the other team!