I'm doing almost the same thing. I have a simple script that opens a ~/Documents/devlog/20171015.txt automatically when I start working. When I need to find so

I'm doing almost the same thing. I have a simple script that opens a ~/Documents/devlog/20171015.txt automatically when I start working. When I need to find something old I use fgrep on that folder. Works like a charm. It's plain text, no defined structure. I dont't use it for TODOs as that info would get easily lost. I use it almost everyday, specially when something different happen: how to release an old piece of software that current setup dont support anymore or how to connect to a service that I only use sporadically. I tried some tools and apps for this, even tried to track that for a few days in Trello. eventually I gave up and went back to the plain txt file.