Productive vs non-productive creativity

I have a slight struggle that I wonder if anyone else can relate to. I'm a creative "type" in that both my job (scientist) and hobbies (many, over the years) require constant innovation, in addition to the usual labor, to keep them going.

I have a note/journal app where I store my ideas. Sometimes these are ideas with acute utility e.g. an experiment design that I can test out the next day at work or maybe an idea for a paper. Other ideas are what I would consider "highdeas" - insights or thoughts that seem amazing when you're stoned but after you sober up they're kind of nonsense. The former are productive and the latter are non-productive forms of creativity (barring any offshoots of the latter that prove useful later on).

But then sometimes I get idea in-between. Say, an insight into how certain human behaviors are a certain way or maybe a rant on a topic/issue in my lab work that is interesting but not valuable enough to publish or bring up in a formal meeting. My question / discussion topic for you, is, what do you do with these sort of self-ascribed interesting ideas that have no immediate value? One option is to write them out on a forum, as I am currently doing, but I would end up writing all day. Does anyone else keep track of these? Do you schedule a follow-up with these intermediate ideas for future inspiration? I currently use Joplin which is great but I don't think there are any features to stimulate creativity in this manner.