People following a Mediterranean-style diet may have the best chance of keeping weight off — and doing it without causing negative side effects — according to a study published in the Journal of the American Medical Association.
and a few other interesting ideas:
Low-glycemic index: similar to the Mediterranean diet, with 40% of total calories from carbs, 40% from fat and 20% from protein. The diet emphasizes whole grains like oatmeal and brown rice, low-fat meats like fish, fruits and vegetables, beans and healthy fats from olive oil and nuts. It avoids highly processed, sugary carbs and snack foods.
Some additional Glycemic Information http://www.amsa.org/healingthehealer/GlycemicIndex.pdf