dont shoot so many arrows man. it creates bad habbits. i personaly only shoot one arrow at a time, but shooting 1-3 arrows will help u concentrate more on your form. you wont b so relaxed knowing u have 15 arrows sitting next to you and thinking the last one didnt matter. just shoot a few at time and focus on holdign the pin in one spot. and keep aiming for it.
Hope it helps, PH