Rehearse impact against a wall to square the face
The coach recounts a drill he used to do to groove the impact position. He would imagine a flat line or wall on the inside of his left foot, take the club up, then rehearse it right back to that position, checking that the club face matched up square against the wall. He notes not enough people practice that impact position, and says it is why he has the awareness of how to return the face to square.
Channel: PorzakGolf
Watch official source at 5:49