On any putt from over 10 feet away from the cup, line up your shot while mentally adjusting for green speed and topography. Then hold
to perform a putt preview. If the white line goes to the hole and ends there, your preview is right on. Now you have to actually putt it in by perfectly swinging your putter. This means drawing your swinging stick back slowly and then as the backswing meter hits the white % marker, push up on your stick. If the ball goes in, achievement is yours. On certain easy/amateur difficulties you get a putt preview on every putt/hole, so if you miss your chance, you can try another putt preview on the next putt/hole to attempt this achievement again.
ball on green, over 10 feet from cup
putt preview goes into cup
subsequent actual putt goes into cup