I started keeping a work journal a few years ago and it has changed how I work for the better. It is just a text file.
The main value of it is that I can search it! When I'm figuring something out for the first time, and I have a lot of trail and error, I write down what I did. And then I might not touch that thing again for 6 months. When I come back to it, it is unlikely that I will remember what I did exactly but because it is written down and searchable I can quickly recover my old state.
I like this so much I also started a personal work journal for my home lab. It really is useful for me. But its primary value is that I can search it.