"What works for me is taking notes via email. Backing up, organizing, searching, and distributing email is more-or-less a solved problem, and my note-taking inherits those solutions. I can read and add notes from my phone and from my computer, with the ability to choose from a plethora of applications. I have multiple backups of my email around the world via standard email syncing. My email host has been 100% reliable in not losing my emails, as well. If I want to migrate to a different email host, that is trivial."
I wouldn't say my notes have much structure, though.
"What works for me is taking notes via email. Backing up, organizing, searching, and distributing email is more-or-less a solved problem, and my note-taking inherits those solutions. I can read and add notes from my phone and from my computer, with the ability to choose from a plethora of applications. I have multiple backups of my email around the world via standard email syncing. My email host has been 100% reliable in not losing my emails, as well. If I want to migrate to a different email host, that is trivial."
I wouldn't say my notes have much structure, though.