Brotherhood Of The Slingshot Nutz
The best advice I can give for accurate shooting is to be sure you are truly seeing the target. Concentrate on it and if you feel a loss in your attention, just pause, breathe and reset for a new shot. It feels almost like you are trying to guide the ammo to the bulls-eye with the lazer of your vision. I know it sounds corny, but besides proper form and technique, seeing and holding your attention through the entire shot is key to tighter groups.