Making putts comes down to marrying the line with the speed, but if you can only have one perfect, make it the speed.
Using a drill Jordan Spieth employs to adjust to green speeds, attempt to hit putts from 30, 25, 20, 15, 10 and 5 feet between the hole and 10% of the distance (30 feet = 3 feet past; 25 feet = 2.5 feet past, etc) past it.
