This is a great drill to promote a nice crisp strike with your iron shots.
Take a piece of chalk and draw a line on the range mat at right angles to your ball’s target line. Setup with the club against the line, making sure you have the correct ball position for the relevant club.
All you have to do now is focus on striking just on the hole side of that line. This will help you instinctively create a powerful impact position and get your weight shifting better through the ball.