This document discusses the importance of self-discipline and provides examples of how to strengthen it. It defines self-discipline as controlling desires and feelings to achieve goals instead of instant gratification. The principles of self-discipline are setting goals, having a strong desire to achieve them, persevering despite failure, and taking things one step at a time. Ways to strengthen self-discipline include committing to its development, being accountable, practicing self-discipline, doing enhancing activities, and eliminating harmful habits.