Book excerpt: Abstract: A 21-day mental diet plan was designed for permanent weight control. Based on behavior modification, the program explores various psychological aspects of dietary change: self-awareness, appetite control; mental programming for weight loss; subconscious programming; relaxation and others. Specific techniques include use of: creative imagination which involves body image and a daily pledge; self-forgiveness; reprogramming around mind barriers; prison keys (knowledge is power); and slim tips (proven methods for weight control). (kbc).