Effective resource materials for general studies preparation for UPSC include NCERT textbooks, standard reference books, and curated notes. Following a structured study plan incorporating materials like *LP Suman's books* or *Ramesh Singh's Economic Survey* can provide depth in understanding key topics. Online platforms, coaching modules, and current affairs compilations also enhance knowledge. Utilizing diverse sources helps develop a well-rounded perspective essential for both the Mains and interview stages of the examination. Regular revisions and practicing mock tests from these materials are equally crucial for success.