Aspirants can leverage cross-disciplinary knowledge for effective UPSC preparation by integrating insights from various fields into their study approach. Understanding connections between subjects, such as economics and sociology, allows candidates to develop a holistic perspective on issues. This interconnectedness enhances analytical abilities and equips aspirants to tackle nuanced exam questions. Utilizing case studies or current events that span multiple disciplines can further enrich understanding. Additionally, collaborative study sessions with peers from diverse academic backgrounds can facilitate knowledge sharing and enhance critical thinking.