Research reported by cell.com: http://bit.ly/1MrvqJy shows that not all types of calorie restriction are equal. Cutting fat intake resulted in greater fat reduction in the participants than cutting carbohydrates. In the reduced fat intake diet, calories were metabolised by both fat and carbohydrate sources in equal measure.
This is interesting research, but hardly prescribes a full solution for people suffering from obesity and the related illnesses that it creates.
Boredom, advertising, TV, sedentary employment, every journey made by car, peer group habits are all obstacles.
Turning cooking into an art, endless hobbies (example herb garden), walking whenever possible, exercise and health related movement at home (yoga, tai chi, pilates) all help. So would the ceremonial sacrifice of the TV ... but don't hold your breath :)