Tom's advice is extremely simple. First you strengthen your grip so you automatically close the face through impact.
Then you control the trajectory this way:
- Raise your lead shoulder and move the ball forward in your stance to hit it high.
- Lower your lead shoulder and move the ball back in your stance to hit it low.
You'll also need a bit of practice to make sure you don't hit the ball fat or thin when you change your shoulder angle. Changing the shoulder angle could change your swing plane if you aren't careful.
But this is yet another method of hitting draws that has been successful for one of the game's legends. If you haven't found a consistent way to draw the ball yet, you might want to give this one a try.