Ok, I'm old. Started working hard on the short game past few seasons as a way to keep scores under control.
A new stat I've been keeping while reviewing rounds is how many 'truly makeable putts' went in. How many were missed? What is my 'make' percentage from 5' and in.
Part of my short-game practice routine is holing a good number of 2-5' putts from all sides of two or three practice green holes. When reviewing a round, most players can admit to missing 2-4 putts they should have made over 18 holes. I used to miss more than my share.
I've been keeping this stat all season. Last two weeks I didn't miss a single 'makeable' putt. In 7 league 9-hole rounds this season I've only missed three. Almost never 3-putt anymore, either. Practicing the short putts is definitely paying off. It will for you, too if you have the time.
Hope this idea helps someone out there!