In his new book The Power of Habit, Charles Duhigg explains that just by recognizing them, you can change your habits.
Personally, I have a nightly habit of a glass (or two) of wine. At first I was like, it's cool, it's European! But I've realized that as soon as Toby goes to bed—ding, that's my cue—I immediately expect that crisp glass of wine. Duhigg shows how to snap out of your routine (and this week, I've just had water).
Do you have a habit you want to break? Doesn't everyone?