Leverage the insight from above, don't rule out all food some of the time, rule out some food all of the time. In other cultures outside the States, at least in many sections of society, these kinds of rules are followed. 1). No sweets, cakes, donuts, any mixes of fat and sugar (or at least never eat these on your own or when not celebrating something) 2). stick to meal times. ... then if that still doesn't work you can do things like buy smaller plates, rule out meat or dairy... there's always a rule that will fit.

Over-eating is probably more difficult for other reasons like image and identity, ideas of physical permanence, the brain chemistry.