Aspirants can enhance their presentations during the UPSC interview stage by practicing effective public speaking techniques. Utilizing clear and structured communication helps to convey thoughts confidently. Candidates can also work on their body language, maintaining eye contact and a positive demeanor to create a strong impression. Engaging in mock interviews with peers or mentors provides constructive feedback, highlighting areas for improvement. Preparing well-researched content, aligning it with their passion and knowledge, ensures answers are informative and engaging, ultimately enhancing their overall presentation skills.