When I started with my current employer, lo the many years ago, I started taking notes in text files. One text file per day, every single day. I have (nearly) all of them, just in case I need to refer back to something I did [mumble] years ago. It happens!
It’s not a bad system, obviously, since it’s served me well. Text files are easy for the computer to index for searching, to name one useful feature.
I manually created a new file every day, and at the end of every month (and every year) I moved the previous month’s/year’s text files into an archive folder. Also, I pressed Ctrl+S a lot to make sure I didn’t lose information as I go. The “ongoing notes” and “to do list” sections I maintained at the bottom of the file needed copying over to each new document every morning.
At home (as it were) I’ve been using Obsidian, the notes tool which saves everything as a discrete Markdown file in its library structure, for all of my personal notes for a few months now. A Markdown file is just a text file with simple formatting markers that reads like plain text in Notepad++ but does fancier things in a product like, well, Obsidian (and others).
So at the start of 2024 I made the change: A new Obsidian vault in my “work” document folder, complete with automatic creation of the new day’s time file every day, already placed into a year-and-month folder structure. The carry-over notes and to-do list are separate documents “outside” the day/month/year structure but still in the vault. And since Obsidian saves changes as you go, I spend a lot less time hitting Ctrl+S. (Or, I will, once I break the habit…)

Was this really worth it? Who knows? Who cares! It feels like an improvement, and “a change is as good as a rest.”