In order to achieve long term success in your health and fitness you need to address the thought process that brought you to your current state of being. Trying to start a new diet plan and exercise program without addressing and correcting negative thoughts and behaviors will inevitably lead to failure; to have good physical health you need to have good mental health. All 3 areas are important to address, however your thoughts drive the entire experience and must be in order to lead you on the path to success.
The behavioral change process is based on self reflection through guided sessions where we find healthier thoughts to replace less than healthy thoughts which usually lead to less than healthy actions and a less than healthy life. You cannot control the thoughts that enter you mind but you can control your reactions to them and replace them with constructive helpful thoughts to move you onto a productive, healthy life.