If you know you can't just eat one home-baked cookie, one handful of potato chips, or one scoop of ice cream, then don't. Most registered dietitians wouldn't recommend cutting out a food group, but this might be the only instance where avoiding a food is helpful in preventing overeating. Neuroscientist Susan Peirce Thompson, PhD, believes that the notion of "everything in moderation" is not a one-size-fits-all concept. Certain people are more susceptible to food addiction, so if this sounds like you, avoiding highly-addictive foods like sugar and flour will actually eliminate your cravings for them.