You concentrate on the center of the target, as you would with insitinctive shooting, and as you bring the arrow to anchor you note the arrow tip in your peripheral vision, whilst maintaining total concetration on the center of the target. The tip would be placed at an imaginary point that, with continual shooting, will be ingrained in your memory for certain distances. It's kinda like a "back up" to instinctive shooting.
The two biggest things it's helped me with are long distance shots and targets where a center is hard to distinguish (like on a plain paper plate or a board).