Also, for a bunch of cases, you can use something akin to a multi-step ceasar cipher. Yes, the obvious case of e.g. rot13 isn't exactly helpful security wise,

Also, for a bunch of cases, you can use something akin to a multi-step ceasar cipher. Yes, the obvious case of e.g. rot13 isn't exactly helpful security wise, but if you select e.g. 4, 22, 18 as the rotation order now you only need to be able to memorise -that- to get your passphrase back from an otherwise unmarked file lying around in the same (or other) storage. Obviously, think hard about your threat model for that one, but if (as I keep procrastinating) I ever put backups of such stuff on something like rsync.net I'd give something akin to that approach serious consideration as being an acceptable trade-off overall.