No help as such. I do recommend using Lastpass or other password saver. I used to use a small address book to save my passwords, and if you do remember to update it as you change it. If you are in a position where you cant have a notebook, try putting them in a document on your computer that can be protected or put it in a file with a deceptive name. I once used a file named Roster quilters 2016. Others will have better ideas
I thought of the name witness protection; that made me laugh. But that is way too obvious.