If you cant get a cheap rangefinder, get some string and cut in a 30 yard length. Get a buddy and go up to your treestand and hold one end of the string and have your buddy stretch out the string and walk around your stand and mark off 10, 20, 30...whatever yardages you want by putting surveyers tape on a few trees. Do 2 or 3 just to give you an idea. Its simple.
When in doubt, when shooting from an elevated stand, aim a little lower than normal.
Practice from elevated stands in the off-season and try to use 3D targets.
