[YodasLuke]

Aim as small as possible. Never aim at an area, aim at the smallest thing possible, like a blade of grass or the edge of an old ball mark. This way if you miss that quarter inch target you will still have a chance of hitting the 4.25 inch target.

This is great advice. I use this in ALL shots, including putting. I would add: this intermediate target should be as close to the ball as you can get it. It's always easier to aim at a blade of grass within 6 inches of the ball, rather than at a hole that's 40 feet away.

Seemingly, the better putters aim precisely and use a close intermediate target. The worst putters aim in a general area that's too far away from the ball.