To prepare for the integration of multidisciplinary subjects in UPSC, candidates should adopt a holistic study approach. Start by identifying overlapping themes among subjects such as politics, economics, history, and geography. Use comprehensive study materials that cover different subjects and promote contextual understanding. Engage in interdisciplinary discussions or study groups to gain varied perspectives. Regularly practice essay writing that incorporates multiple disciplines, showcasing interconnections and depth of knowledge. This multifaceted preparation not only enhances critical thinking but also enriches responses in the exam.