Short game expects delicate hands on the grip to take the tension out of the shot. A exercise I use with students is to place a doubled up wash cloth in the palm and fingers of their right hand during the swing when practicing. (This arrives hard to grip the right hand too tight on the swing.)

It also enables golfers to get an improved feel when swinging the club on these shots. I also advance students to make practice swings with their eyes closed, as this is another way to improve feeling.
Visualize the shot

Choose a spot on the green where you want to land the ball and visualize the flight of the ball in the air.

This is really important; if you exercise this technique, you'll start to hit these shots the way you envision them.