Do you use a password manager - like Lastpass, 1Password, Dashlane? A pen & paper solution? Your own DIY solution?
I use one of the above and sync among multiple smartphones, tablets and computers, nothing stored in the cloud, 100+ passwords (including other family members.) I ask my friends out of curiosity and some of them say - I just use e-mail? Huh? They meant use the forget password link and e-mail to set new one.
After national fix your family's computer week, it's a immensely useful way to keep track of so many passwords.