I do as many have described - step on the left heel and make sure my left glut goes back to the (invisible) pane of glass before my right hip rotates forward. I've only been doing this for about a month but it has transformed my game.
While on the course, to keep this feeling going I do the pump drill where I make sure I also send my right shoulder down towards the ball.
At home I use an impact bag which makes it quite easy to get this move grooved.
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