There's a simple rule to getting your pitch shots to spin and stop - all you need to do is strike down on the ball.
Where most amateurs fail is in the angle of attack. Instead of hitting down, the club approaches the ball on a too shallow path.
This leads to two faults. Either the hands try to help the shot into the air and cast the club into the ground early causing the fat, or the club catches halfway up the ball and sends it thin.
TG Top 12 Teaching Professional Dan Frost has a simple practice drill using an old golf shaft you can use to train the correct angle of attack into the ball.