One possibility is to make yourself primal treats (like chocolate mousse) so good that what is around doesn't look good. I find something really rich so satisfying that I have no impulse to keep eating. Don't go hungry to lose weight until you have worked through the binges. Another possibility is to have a creature who expects those leftovers. If you don't have a dog, squirrels love peanut butter sandwiches and may even start coming to a window or porch at a regular time to get one.