Statistics say they only have to keep at it for 14-18 days before the new routines become habitual. I had a friend that ballooned up at one point, and started to make changes. I told her about the statistic and she went gung-ho for that time period, it mellowed out a bit after that but she lost all the weight and kept it off because she formed proper habits. I feel like more fatties would try harder if they knew that a happier and healthier lifestyle needs a few weeks to establish itself.