Ask HN: How and where do you keep your notes/references?

I’ve been trying to consolidate my notes, references, long term lists. I tried using software like OneNote, Evernote, iOS Notes app, etc but it seems to get very disorganized very quickly.

I see some GitHub links posted here that shows people using their Readme.md as a reference file for various things.

Then it occurred to me that I can start organizing my stuff on a local static html page.

But I am also wondering how everyone else here stores and keeps track of their “knowledge”?