Mark/ Hopkins, MN
Combination of cheap rangefinder (aim the pin on graph lines), tee boxes, sprinkler heads, sight-line, and experience.
As a sixty year old guy, with more time than money, knowing where and how far to hit a ball is the difference between enjoying the game and blind effort, hope, and frustration.
I use a 10.5 degree driver (used on open tee shots only), a 13.5 degree 3 wood (more accurate tee balls), 16.5 degree 4 wood (maybe my favorite club ( hit it further than 15/3 wood, lines-up clean, unlike any 5 wood), and 19 degree hybrid. Where the ball lands using these clubs determine if and how I find greens. I can chip an and putt well enough to score when I am able to choose my lay-up and approach game, with more information and care.
I am will to do the testing, it could only help me and middling hacker's game. I need the challenge to get better.
Thanks, for your consideration.