The Rat in his arm-chair before the blaze was alternatively dozing and trying over rhymes that wouldn’t fit…- From “The Wind in the Willows”, by Kenneth Grahame, chapter three.
There’s an easy way to file away ideas and thoughts. It’s not by filing ideas and thoughts for different genres into different notebooks, but simply keeping a notebook for everything that comes to mind. I’d been doing that way, but realized the put everything in one place approach is better. I’ve been keeping my Bible reading notes in one exercise book. This was for the purpose of jotting the ideas I get from reading the Bible which could become devotions, meditations and reflections. When other ideas came to mind, say a story idea that jumped into my head, I had to find a different notebook, or piece of paper, to jot the idea down. But it would be quicker just writing the idea in my devotional notebook because that was handy. I don’t like mixing various ideas around in a notebook intended for one thing, though. It makes much better sense to include everything in one notebook, doesn’t it? So, all one has to do is headline each notebook entry for what kind of idea it is: be it devotional, story, article, poem, etc.
And if one is the run, one may keep a recorder, or something like it, for easy recording when ideas come to mind. Keep the ideas in one place on the recorder and indicate what each idea is, whether story, article, poem, etc. Much better. All in one place and headlined for easy reference. All one needs now is a good notebook and/or a digital recorder. Digital recorders hold more information so spending on one is probably cheaper in the long run than buying notebook after notebook. May be just invest in a simple digital recorder for note-taking, if one likes, if that’s easier when on the run. Or write it down, if that’s preferable.