Making YouTube videos to retain knowledge.
In 2020, I wanted to learn about micro-services so I made a project to learn the basics of Docker and containerize a web app.
If I went back now to read the code, I'd have no idea what's going on. Fortunately, I made a detailed video[0] explaining the workflow and I can always reference that if I want to pick up where I left off. It's also nice to see that nearly ~2k people found that video useful.
Whenever I learn a new technology/framework, I immediately make a short video about it, and I OFTEN come back to reference that video at later dates.