Dr. Roy Baumeister:
One common problem is that people make multiple resolutions. These are all effectively commitments to use one’s willpower. Unfortunately, just making the resolution doesn’t increase your supply. When you have several resolutions, each time you try to keep any of them, you use up some of the precious willpower that is needed to keep the others. In other words, multiple resolutions all work against each other and undermine each other’s chances of success.
