Anyone will tell you that making changes and creating new habits is difficult. Just ask the person who is day 2 of their new diet. Ask a personal trainer how the clients cope. Change doesn't come easily.
This video is about encouraging people to change their habits and their tool is choice is fun. They use a simple but very clever idea that works. Perhaps we could think about using 'fun' as our incentive for change. Something that is good for us is not the only incentive we need to help us maintain change, is it?