Previous UPSC candidates can significantly aid new aspirants through mentorship, sharing valuable insights into the examination process, study techniques, and time management strategies. They can offer guidance on navigating the syllabus, emphasizing the importance of current affairs and previous years' papers. Additionally, they can provide emotional support and boost motivation, helping aspirants recognize their strengths and address weaknesses. Participating in peer-learning groups with seasoned candidates fosters a collaborative environment conducive to success, enhancing overall preparedness and confidence.