Zim wiki or just text files in a folder. Nothing special. Don't get special with it. Waste of time. I use zim-wiki for simple searchable lists. I also journal,

Zim wiki or just text files in a folder. Nothing special. Don't get special with it. Waste of time. I use zim-wiki for simple searchable lists. I also journal, but hand-write everything. Keep a few pages blank in the back for an index. Then when I fill a journal, I go back and read it, and write out an index on those last few pages. Keeps things as searchable as is possible for a dead-tree diary, at least the important bits and keywords. Creating an index like this forces you to revisit, evaluate things. Forces you to think through what's important, what to take away from what you've written. You may take away very little (and that's okay).