This isn't about will power alone.
Resolutions don't fail because the vast majority of us don't have enough self-control or motivation to succeed; resolutions fail because at the root of it, they aren't deeply planted in our hearts.
Sometimes we think we want things a whole lot more than we actually do; even harder to consider but also brimming with truth -- sometimes we think we value certain things when we actually hold them as ideals.
To read about how to make and keep a solid resolution, click HERE.