I believe Spazsdad hit the nail with a wink,,,,feedback at practice.
Practice practice practice. Reps reps reps. If you are not getting your reps,,get them on our off time.
This is why they call it practice. Not routine or going through the motions.
The more the batter practices and does reflex hitting the less they think in the box.
The rule remains the same.....from 12u to and through college, if you can hit, we'll find a spot for you.