Techniques to enhance retention of study material for the UPSC include the use of active recall and spaced repetition methods. Engaging with the material through summarization, mind mapping, and teaching concepts to others can solidify understanding. Utilizing flashcards for quick review and creating mnemonics for complex information aids memory. Regular self-assessment through quizzes and mock tests can reinforce learning. Furthermore, maintaining a structured study routine that incorporates varied formats—like videos and books—can help keep the learning process dynamic and engaging, thereby improving retention.