I really like employing the "right now" drill. During practice I use it as a tracking drill but it's really helpful in timing pitchers. When the ball leaves the pitchers hand the hitter says RIGHT and when the ball is where we want to hit it we say NOW. In practice you say the words out loud but in games you can say it in your head. I've had great success with kids from 8U to top 20 ranked 18U.