Effective resources for current affairs preparation for UPSC include newspapers like The Hindu and Indian Express, and monthly magazines such as Yojana and Kurukshetra. Online platforms like PIB (Press Information Bureau) provide official updates, while apps and websites like IASbaba and Insights on India offer concise summaries. Regularly following these resources ensures that aspirants stay informed about national and global issues, which is critical for both prelims and mains examinations, enhancing their overall preparedness.