Self-discipline involves acknowledging that you are in control and should not give in to external temptations. It is important to act as the general of your life and not take orders from unhealthy cravings. Behavioral modification techniques like not keeping tempting foods in the house or not going shopping when hungry can help build self-discipline. Engaging in productive activities like working out and eating a nutritious meal before going shopping can boost discipline and reduce the desire for unhealthy choices. By strengthening self-discipline, resisting temptations becomes easier, making it unlikely to betray your own values.