Do you run a site with multiple users logging in? Do you ever need to log in to another user’s account?
That can be awkward – you either have to temporarily fiddle with the database to temporarily changed their password; or to request them for their password.
There’s a better, easy solution: the little-known “Use Admin Password” plugin. It’s free, from the main developer of UpdraftPlus: https://wordpress.org/plugins/use-administrator-password/. Tested and working up to WordPress 3.6.
When it’s installed and activated, it needs no configuration. It does one thing, and one thing only. It lets you log in with any username, as long as you enter the password of an administrator.
e.g. If you are Mr. Admin, and your password is “myadminpassword” (what a terrible password!), then you can use that password to log in to any other account. Just type in the account username (user1, bob, cheese, whatever) and enter your password – and you’re in.
You’ll want to make sure that your admins have sane passwords, of course! If you happen to have something really terrible as a password, then you’re opening up access to anyone who happens to guess that terrible password on any account.
Final tip: if your web browser has a “Private browsing” mode, then you can use that to log in to the site with multiple usernames at once. Your “private” window/tab won’t know about logins from other windows. So you can have an admin login, and another login, and sort out your problems really fast.