(I originally used Vim, but then I switched to Emacs + Evil.) I started out organizing my ideas in a single hierarchically organized text file (I call it ideas

(I originally used Vim, but then I switched to Emacs + Evil.) I started out organizing my ideas in a single hierarchically organized text file (I call it ideas.org because I use org-mode) based on the categories of my ideas, and as each category grows, I place it into its own text file, replacing its former place in my ideas.org file with a link to the new file (this is where it sure would be nice to have Ted Nelson-style transclusion). As each category grows subcategories, I place those into their own files too.