For effective public speaking in UPSC interviews, candidates should emphasize clarity, structure, and confidence. Practicing through mock interviews can identify areas for improvement and build familiarity with potential questions. Techniques such as employing an engaging opening statement, maintaining eye contact, and utilizing pauses effectively enhance delivery. Body language should convey confidence, ensuring a positive impression. Additionally, aspirants should work on articulating their thoughts coherently, showcasing their analytical skills. Being well-versed in current affairs and personal experiences can enrich responses and demonstrate comprehension. Overall, continuous practice and feedback help refine these skills, improving performance during actual interviews.