Password are 3 enough? Are 5 too many?

So it seems you need a password for everything.  The library, the ATM, fb, blogspot, work computer, home computer, the bank, insurance...then you start managing your mothers accounts.  More passwords to remember.  I understand it but OMG.  I can't remember them all....then you get the e-mail, "it's time to update your password."

I don't have that many words in my vocabulary.  Rhonda taught me a trick on how to keep track of them.  I forgot what she told me.

I want a thumb print or a cornea scan.  I have not enough brain space to keep track of the passwords.