Successful candidates typically prepare for the interview stage of the UPSC by engaging in extensive mock interviews and self-reflection. They refine their communication skills and stay updated on current affairs. Knowledge of their DAF (Detailed Application Form) is critical, as they must be prepared to discuss personal experiences and motivations. Additionally, candidates frequently read relevant books and articles to deepen their understanding of governance and ethics. Building confidence through practice and constructive feedback from mentors helps candidates present themselves effectively during the interview.