Us human beings often think that if we lose weight or attain some other goal, we will be happier. Not true. Our happiness has only a minor connection to our external world and the goals we reach. Rather our happiness is based on how our brain perceives the external world. Watch this 12 minute TED video to hear psychologist Shawn Achor, a funny guy, talk about how we can create happiness. Here he is talking about work but it applies to all aspects of our life (including weight loss). He gives the nutshell solution for retraining the brain in the last 2 minutes so enjoy it to the end.
Shawn Achor on Happiness