Self-discipline is critical in a successful UPSC preparation strategy. It helps candidates establish a consistent study routine, manage time effectively, and stay focused on their goals. Self-discipline allows for adherence to study schedules, ensuring that all subjects and topics are covered systematically. Moreover, it helps in resisting distractions that can derail preparation efforts. By cultivating self-discipline, aspirants develop a stronger commitment to their learning, leading to improved retention and understanding of material, which is essential for tackling the extensive syllabus of the UPSC exams.