I’ve started to keep a Spark File in Notebooks, mainly as an experiment.
This is why for the past eight years or so I've been maintaining a single document where I keep all my hunches: ideas for articles, speeches, software features, startups, ways of framing a chapter I know I'm going to write, even whole books. I now keep it as a Google document so I can update it from wherever I happen to be. There's no organizing principle to it, no taxonomy–just a chronological list of semi-random ideas that I've managed to capture before I forgot them. I call it the spark file.
- Steven Johnson, https://medium.com/the-writers-room/the-spark-file-8d6e7df7ae58