RE: shot Distance
Pace yourself: The average person's stride is around 3 feet + or - some inch's so when you get to your stand or blind.
Pace yourself from your shooting poiint to your target area or shooting lane and then mark it on the ground with something like a sent canister or whatever.
Just remember: when shooting from a treesand you have to aim a little lower to compsiate for the angle.
( I think I need spell check )