I am not into writing notes. However I do write myself documentation and I also write a log book for how I configured servers (less necessary now I use ansible)

I am not into writing notes. However I do write myself documentation and I also write a log book for how I configured servers (less necessary now I use ansible). I frequently forget how I did some specific task or solved a particular problem or even how my own software libraries work. Having something at hand (even doc comments) saves me the time of having to go through the same steps again.