I work at a company that needs a lot of passwords but some I don't use everyday so I email the passwords to myself in Outlook. Then when I need to log into a system I just search X system and up pops the password. Then when the password changes I just pull up the old email again and reply to myself with the new one so I can always see the most current password.

A lot of my coworkers write it down on paper and keep it in files so I think my way is safer and more efficient.