If you won't take it from me, beloved family, consider this Password Day (yes, apparently it's a thing) statement from McAfee's Robert Siciliano: "74% of Internet users use the same password across multiple websites, so if a hacker gets your password, they now have access to all your accounts.
http://www.cio.com/article/733001/Passwords_You_re_Doing_it_Wrong._Here_s_How_to_Make_Them_Uncrackable.?source=rss_news