i have a bah-zillion passwords. each is very unique.
not sure how, but i do remember them all.
then again, i know my 16 digit credit card # by heart, my hubby's & my own SSN, all 3 of our license plate #s, dozens of phone#s, snail addys, email addys, birthdays, etc.
just call me rain woman, i guess.
but just to be sure, i have all of my passwords written down in one place.
old skool stylee, pen & paper.