I use an encrypted disk image (in this case a macOS .dmg, but it could be any similar format) filled with text files that I edit in vim. I don't use random pas

I use an encrypted disk image (in this case a macOS .dmg, but it could be any similar format) filled with text files that I edit in vim. I don't use random passwords, I use (mostly) memorable ones. I mount the disk image only when I forget one. It's an aid to help me memorise passwords and keep track of important information (reference numbers etc), not a single point of failure without which I can't get into anything.