Candidates preparing for the ethics paper in the UPSC mains should adopt a multi-faceted approach. This includes studying the syllabus, referring to standard texts, and engaging in case studies to understand real-world applications. Practicing answer writing and reviewing previous years' papers is essential for grasping the exam format. Additionally, discussing ethical dilemmas with peers can enhance critical thinking skills. Ultimately, a strong focus on conceptual clarity will aid candidates in articulating their thoughts effectively during the examination.