back when i was in highschool 10+ years ago, i could not afford a target. so i leaned a ladder up to my house and climbed on the roof. from here i would shoot at premeasured distances. this worked out well for 2 reasons...saved money by not buying a target and made better accuracy for treestand hunting by sighting in from up in the air.

by the way, this never messed up any of my arrows either. i have shot aluminum and carbon this way.