I’ve used various techniques to devise memorable passwords and pass phrases over the years that are easy for me to recall but nevertheless fairly strong.
Here’s one (though it’s not currently active for ALL my password use).
Password construction: Take a song that’s at least 400 years old and uses an archaic form of the language in which it was written. Pick the third (or fourth, or whatever “interior) verse. Sing it backwards. Use the words in this backwards order to construct a password using the second (or third, or whatever; choose at semi-random) letter in each word. Use a number representing which letter of the words, when sung as written, you are using as a part of the embedded “key” to the password. Add at least two symbols that remind you of the site or app you assign the password to and “key” them to the site or app visually or audibly–whichever is a stronger memory gift for you.
Frankly, this is a bit difficult to do for folks who have neither an extensive repertoire of Renaissance (or older) music and lack both a good audial memory and the ability to sing/play something backwards, but it’s fun for those who do. . . or at least for me.
For added complexity, one can take the reversed song and invert the tune, using the letter names of the resultant tune in the password.
Singing a song inverted and backwards, silently as in one’s mind’s ear, in order to extract the password makes me smile, so it’s worth it even if I have to type 60 or more characters.
Don’t do this for a WiFi password for your local network, though. Other folks will probably get lost trying to type it in and give up. Wait. No, DO use this for a WiFi password. It’ll really cut down on traffic. *heh*
OR. . . just use something like Lastpass to generate and “remember” your passwords, if something like this seems like too much work. You lazy bum.