I'm sure I'll get shredded for this, but I keep my passwords in a notebook. Every once in a while I go through and change them all into other random nonsense and reorganize to keep it neat. I am a bit of a notebook fanatic and a have a whole shelf full of them. If someone ever broke into my house there's no way they're going through all of them to find anything like that. If the house burned down, maybe a bit of a problem, but as long as I have my phone I can get my email back, and between my phone and email I can get any of the important ones back as well.

If I had corporate or government secrets and was the target of espionage I'd probably rethink, but the danger of anything is so minuscule.