I have an acquaintance who is a very neat and tidy person. He used to be a smoker and had tried quitting in the past but never could. One day he finally realized that this dirty habit was not in harmony with his lifestyle and self image. Once he made this realization, he was able to give it up and he has not smoked since.
Our perception of ourselves can make a huge difference when it comes to making changes in our lives. Do you see yourself as a fat or unhealthy person who is just pretending to live a healthy lifestyle? Do you think deep down that you are a poser and are just imitating the behaviors of fit people? It is important to change your thinking and self image if you want to make long term changes in your life.
Books like The Magic of Thinking Big, Psychocybernetics, Think and Grow Rich, The Secret, and The Magic of Believing are considered classics in the world of business and self help, but the financial principles they teach also carry over to other aspects of life. How we think about things is crucial to getting results.
Making changes can be very difficult so I am impressed whenever I see people overcome injury, diseases, alcoholism, other addictions, or any unhealthy habit. It's encouraging because if others can make those changes, then so can you and I. Remember that some of the physical changes you you want to make to your body need to start first in your head by having the proper frame of mind.