Why new year's resolutions rarely stick.

Do you try every year to set a new year's resolution, only to have it fail within the first few weeks, or even days, of starting? There's so much hype around "a new year, a new you" that if you don't have a list of at least 5 bold new resolutions that you're actively pursuing, you're made to feel like a failure. But have you ever wondered why its so hard to see these through and why they just don't stick?