Bob,
Was a time that I shot a lot at long range, and in a lot of different locales and conditions.
For me, the best tool was a log book of evry shot with a comprehensive description of conditions including light, wind, and terrain features.
It's in our nature to remember that we made a great shot at extended range. The log book will preserve your perspective and your memories of what conditions were and of the shots that didn't fly as planned.
The right tools can teach you a lot but serve most of us best as a humbler.
