I keep all of mine on a notepad, each site is listed separately with each login (be it a username or email I have to use to log in) and the password for it after it, if it's something I'm going to want to access from my phone I make it something easy to remember but hard for anyone else to guess. But having a notepad file (and having it backed up on an external drive) has really helped me out. Each time I need to log in I open it up and scroll to the login I need. I don't really even trust autosaving passwords for really important stuff like bank and paypal, who knows if some day someone can figure out how to access your computer and hack that.