Strategies to enhance retention of studied material for UPSC aspirants include active learning techniques and regular revision. Techniques like summarizing, teaching peers, and using mnemonic devices can improve understanding and recall. Setting aside dedicated time for revision allows candidates to reinforce concepts at spaced intervals, thus aiding long-term memory. Making use of visualization techniques, such as mind maps or diagrams, can make complex information easier to understand. Additionally, connecting new knowledge to existing knowledge can create a more robust mental framework, facilitating better retention and recall during exams.