Recommended study materials for UPSC preparation include NCERT textbooks for foundational knowledge, along with standard reference books like Laxmikant for Polity and Spectrum for Modern History. Newspapers, especially The Hindu and Indian Express, are crucial for current affairs. Online resources, including government publications and reputable educational portals, can provide updated information. Aspirants should also utilize study guides specifically designed for the UPSC syllabus. Joining coaching institutes or study groups can offer additional support and valuable insights. Overall, a diverse mix of resources tailored to one's learning style is vital for effective preparation.