Contrary to the other comments saying to carry a pocket computer: my brain. Hence the improved memory. I offload my thoughts into my notes when I can. If it wasn't important enough to remember until I can find a seat at my desk, it wasn't important enough to write a note on.

We have computers we can carry around in our pockets now!

Lots of approaches exist, mine is Obsidian + Syncthing and just jotting down notes on my phone that I go flesh out when I'm back at my PC.

I’ve found these work well:

https://www.ataglance.com/p/planners-calendars/journals-diar...

No batteries or Internet required.

One option is using voice assistants to send a message to your todo inbox.

Use your phone

or note book which you later re-write into your knowledge base.