Just to add to the excellent advice so far: make sure no fired pellet leaves your boundary, or the boundary of any land you have permission to shoot on. Sometimes pellets go through quarry too!
B.A.S.C | HW100Tuning KT250bar+reg+tune .177+4-16x50 | HW95.177 +4-16x44 + Paul Short Stage 4 & Trigger Tune | TX200HC.22 + 4-16x44 | HW97KT.22 + 4-16x44 + Paul Short Stage 4 & Trigger Tune
"I have found that deterents such as hanging up CDs are not very effective"
Try the Spice Girls CDs - that should deter most things