My employer has this odd policy where they force you to change your password, once every six months or so. Its annoying, because sometimes, you forget your password. Its inherently more insecure to write it down somewhere, isn’t it? Plus, you can’t reuse passwords.
However, my mail client always has my password. And therein comes, a useful Thunderbird add-on, called Password Exporter.
Now, I can see what my last known password was, and login when need be.