I need a combination of digital and analog. I've collected my ideas in a Google Sheets document, but I don't want to be limited to that when I get ideas. I want a notebook handy when something comes to mind while reading or listening to a podcast.

I have several small notebooks I keep in various places. Once a week or so, I'll type ideas from these into Google sheets. My free-writes are always on paper. My drafts are either on paper or on screen.