According to Dictionary.com, a habit is an “acquired behavior pattern regularly followed until it has become almost involuntary.” This means that a habit is a behavior that is repeatedly done until you almost don’t know that you are even doing it. It becomes like second nature to you. Back in 2010 a University College London study showed that it took an average of 66 days (i.e. over 2 months) to make a new habit virtually automatically.