The best resources for self-study in the current affairs segment for UPSC include reputed newspapers like The Hindu and magazines such as Yojana for comprehensive coverage. Monthly compendiums from civil services coaching institutes summarize current events concisely, aiding retention. Online platforms like PIB and government websites provide updates on policies and initiatives. Additionally, using apps designed for current affairs preparation can facilitate learning through quizzes and updates. Engaging in group discussions and summarizing news articles enhance understanding and retention of critical information.