Most of us are living with at least one bad habit, although we don't like to admit it. Some habits, like smoking, can pose a severe health risk, but others, like knuckle cracking and nail-biting, are just tedious. Odds are you've had your bad habit for some time, which might make you think that it will be difficult to break. Fortunately, if you follow these three simple steps, you can break your bad habits.