Sorry for late response. I usually take down notes, but don't always remember where I put them. They are usually organized into what makes sense, but if I later remember and want to go back to that topic, I may not remember where it was written down.

For example I may have an idea to do something, and that would be in google docs, but then I might have some tasks and put them into trello. By searching for the idea's name, I should be able to see both the original write up and the tasks in trello, and potentially any messages I wrote to other people about it.