To tackle the Psychology optional paper in UPSC, candidates should adopt a structured approach. First, focus on the UPSC syllabus to identify key topics. Utilize standard textbooks for comprehensive understanding and ensure clarity in fundamental concepts. Practice previous years' papers to get acquainted with the format and question patterns, emphasizing time management. Joining study groups can facilitate discussion and deepen understanding of concepts. Regular revision and self-assessment through mock tests also play a crucial role. Lastly, integrating current affairs related to psychology can enhance relevance and perspective in answers.