Diet: slow gains?

An average adult gains one pound per year. Small changes in diet, consumption of beverages, physical activity, watching TV, and sleep duration were most strongly linked to long-term weight gain. The idea of "eat less and exercise more" may be too simplistic a weight-loss strategy, as it is the quality of food that matters most and making a handful of small, targeted changes is likely to be most effective.
New England Journal of Medicine, June 2011