Providing people with good information about physical fitness, stress management, nutrition, etc., is important, but insufficient. It is not a matter of lacking information. When you look at living a healthier life, there seem to be certain factors that have emerged from the last twenty years or so that the wellness movement field has identified.
Wellness is a holistic concept.
Anything short of that is incomplete and ultimately ineffective. We need to look at the whole person and plan lifestyle changes for mind, body, spirit and environment. Just working at the dimension of wellness that you already like, such as exercising and minimizing the others, like stress management or nutrition, doesn't work in the long run. Self esteem is the critical factor in change. Wellness is caring enough about yourself to take stock of your life, make the necessary changes and find the support to maintain your motivation.