This may sound weird to some of you, but it makes sense to me and it hasn't let me down.

When I sight-in, I pace off distance. I set my top pin at 20 paces, my second at 30. Between a month and no later than 2 weeks before opening day, I go out and trim shooting lanes and clean trees for my stands, and then I pace off distances to trees or trails. Nothing farther than 25 yards. I'm always really close, my paces in the woods compared to my paces in my back yard when I'm sighting in. I've watched my arrow disappear behind my pin a few times on deer, so I know it works.