If you use "123456", "qwerty" or even "password" change your password immediately! According to security group SplashData these passwords are among the 25 most used in 2015.
Every year for the last five years the security group collates passwords from data breaches in America and Western Europe to publish their annual list. We highly advise you take a look at the list below to see if you should change your password. We have also included links to the 2014 and 2013 list.