The first piece of advice I would give Nancy is that she recognize that she is harming her health. That way she would have the motivation and strength to adopt healthier methods to improve and maintain her health.
Once Nancy recognizes that she is hurting herself, I would tell her not to place snacks near her when watching. She should keep the snacks away from her and, if possible, only leave healthy snack options like fruits and cereals. So whenever she feels like having a snack when watching, she should eat healthy snacks.
