To select relevant sources for current affairs preparation for UPSC, candidates should focus on reputable newspapers like The Hindu or Indian Express for comprehensive news coverage. Utilizing government portals and reports provides authoritative insights into policies. Furthermore, standard magazines like Yojana and Kurukshetra offer in-depth analysis of social and economic issues relevant to the syllabus. Online platforms such as PIB (Press Information Bureau) also serve as valuable resources. Candidates must curate and regularly update their sources while ensuring they cover diverse topics, aligning with the exam's evolving syllabus for holistic preparation.