I'm STILL not a very good putter, but it was a revelation that in order to make sense of the dots you need to have some idea of how long it will take the putt to get to the hole. Time the dot movement based on that. DIff speeds? Pick the average speed dot to time.
On flattish tourney greens, a 6 foot putt takes 2 seconds, and a 10 footer takes 3. Putting downhill takes longer, because of the softer hit. Uphill doesn't make much difference as long as you are adding the two extra feet of power to keep from coming up short.
Putts longer than that? Improve approaches. Still not good, but don't 3 putt that much anymore, unless the good old wind VEM has left me a first putt of 40+.
All of this is just a simpler variation on GOLD's Method.