I prefer sitting in a tree stand or a ground blind so i will get time to use the range finder. Last year however i seen a nice buck i was putting the stalk on and when i got to the top of a hill where i thought he would come out, he was right in front of me at 25 yards. For some reason i thought he was at 40 yards and put my 40 yard dot on his lungs. Makes you wanna cry when you watch that arrow sail a couple of inches above his back. I myself while sitting will pace off the yardages from certain landmarks such as trails, tree, bush, stumps etc