Everyone talks about txt files and editors etc, but my main driver is actually paper.
Every morning I pickup a sheet of used paper, and on the backside of it I hand-copy unfinished todos from the previous day. I write down every important details from that day on that paper. At the end of the day, it goes into a file folder for future references.
Actually I got this habit while working in the military, where I received a 1-page-long daily status report every morning. I used that to keep track of both organization status and my daily tasks. I did use this log to analyze, design and optimize procedures, one of which involved over 100 tasks.
Searching over this record can be problematic, but most of the time I have auxiliary records like email, message, call history, etc, which can help me with tracking down “when” things happened. It’s not much different from digging into system log.
However, I think, with the rise of LLMs, perhaps it’s about time to migrate to txt finally.