To improve retention of knowledge for the UPSC, candidates should employ active learning techniques such as spaced repetition and mnemonic devices. Summarizing materials and teaching concepts to others also reinforces understanding. Utilizing mind maps can visually organize information, making it easier to recall. Regular self-assessment through mock tests enhances retention, as does integrating current affairs into studies. In addition to these methods, taking breaks and maintaining physical wellness, such as through exercise, can boost cognitive functions essential for long-term memory retention.