The punch shot is a difficult task to manage even for professionals. However I will try to explain how to execute this very useful and elegant golf shot.
Why use the punch shot? Because to get a lower ball flight. The cause can be the wind or tree branch.
Begin with to grip your club 1-2" lower than the butt end of the grip. The cause why to do this depends on the ball position.
The ball position must be placed closer to your right foot than normal. The closer to the right foot the more you got to grip down on your golf grip.
One way to get more accurate knowledge where to place your ball is to use your golf clubs as a cross at address.