While what Dryridge said is good advice I would recommend doing it at about 5', not 5 yards. This is referred to as "blind baling" and can be a very useful way to learn how to "feel" the shot execution. A lot of target archers use is and do it for hours on end. That's why they shoot so well. They pay attention to their form and shot sequence and not where the arrow hits. Good, consistent form is what leads to consistent accuracy. It builds confidence in your own ability.