I’ve long been a proponent of using a password manager to keep your passwords long, obscure, and unique (so that you’re not using the same password at any two sites.) I recommend LastPass (which is the service I use), Dashlane, and 1Password.
Now there’s another reason to use a password manager: the ability to automatically change a password with a single click. Dashlane was the first to introduce this feature but it is still in beta with a waiting list. LastPass has followed suit, and already rolled the feature out for 75 popular sites, such as Facebook, Amazon and Twitter.