Shockingly, we spend nearly half our day repeating things we've done in the past without thinking about them. How we respond to the people around us; the way we conduct ourselves in meetings; what we buy; when and how we exercise, eat and drink – a truly remarkable number of things we do every day, we do by habit. And yet, whenever we want to change something about ourselves, we rely on willpower alone. We hope that our determination and intention will be enough to effect positive change. And that is why almost all of us fail.