The trick to mastering the pitch shot is to remember it does not require a different type of swing, just a shortened version of your full swing.

However, shortening the backswing does make retaining a smooth rythym harder.

Practice swinging to a clock's ticking.

Alter the distance you hit the ball by changing the length of your backswing, not the power of your hit.

Make a full turn of your shoulders but your hands should only reach shoulder height (about three-quarters of your normal backswing).

This will allow you to attack the ball, but still retain the control essential to accurate pitching.