I've done the same thing, but for more than just bugs. Pretty much any time I learn something while working that I think might be easy to overlook in the future

I've done the same thing, but for more than just bugs. Pretty much any time I learn something while working that I think might be easy to overlook in the future, I write it down. Some of my findings end up in internal training if it's something the team needs to know. If it's something for me, I'll just keep it in my own notes for the next time I encounter it until it's burned into my memory.