Interesting guy. He has a course management system he calls Decade Golf. He says there are five metrics that golfers who want to improve their scores should track but probably aren't:
1) Bogeys on par fives
2) three putts
3) bogeys from 150 yards or shorter
4) failure to salvage easy up and downs (for hackers, he suggests tracking double chips)
5) double bogeys.
He says that, even among good players, the difference between good scores and great scores is not making more birdies, it's avoiding doubles.
A few things he talks about that I think are helpful are:
1) the adage 'never up never in,' while true, is not particularly helpful, and ends up costing strokes in the long run. He says that most people aren't going to make a lot of putts from
20 feet or beyond. From 20 feet, he says, the average length of your putts should be 20 feet, which means that the same number of putts should come up short as come up long. This makes the follow-up putt, on average, shorter, which cuts down on three putts.
2) If you miss the green, and the ratio between how far you are off the green and how far it is from the edge of the green to the pin is 1:1 or greater, the goal of your chip shot should be only to get the ball on the green where you can have a putt. When people try to 'get too cute' with this type of shot, they end up with doubles. So, even lf you have to aim away from the pin, and go quite a ways past it, just make sure you get the ball onto the green. Then, if you miss the par putt, leave it close so you can get your tap-in bogey.
3) If your speed is good, you should be able to get a putt to within ten percent of its original distance. So, within two feet from twenty feet away, within three feet from 30 feet away, etc. Work on speed until you can fairly reliably do this. This also helps in managing expectations. A putt from 50 feet away that you get to within five feet is a good putt.
Anyway, there is a lot more to it than that, but I think that the last three points are especially important.