Recommended sources for UPSC aspirants to enhance their general knowledge include standard textbooks like NCERTs, current affairs magazines such as Yojana and The Economist, and newspapers like Indian Express or Hindu. Online forums, websites, and platforms dedicated to UPSC preparation also offer useful materials. Engaging with documentaries, lectures, and educational videos can facilitate deeper understanding of pressing issues. Additionally, attending seminars or webinars can enrich aspirants' perspectives.