Golfers - what is the best training aid you've tried?

One of the putting machines that kicks the ball back out.
Putting is crucial

Lessons from someone that knows what they’re doing.

Using the boat as a golf cart

Beer.

Clyde Glide putting trainer. Clyde Melancon from Henderson developed it…

I'm not joking

Ben Hogan's "Five Lessons: The Modern Fundamentals of Golf"

Not a swing stick or any other thing like that, but I went from the the nastiest slice you'll see, like boomerang bad two fairways over (was it caddyshack 2?), to playable

I bought a simulator and hit about 100-200 balls when I’m practicing. It has helped me tremendously and taken probably 10-15 strokes off my game. I’m shooting high 70’s to mid 80’s now instead of being happy if I was under 100.

I have a mat, a simulator, and a net I set up so I didn’t go $10k into the whole set up. Probably $1200-$1500 all in.

I won a very nice set of lessons in Orlando Florida and they only used the swingyde. I later bought one and use it routinely