Strategies that can help in retaining and recalling information during UPSC preparation include employing active learning techniques such as summarizing, questioning, and teaching concepts to others. Techniques like the spaced repetition and Pomodoro method can enhance focus and prevent overwhelm. Creating mental hooks by associating new information with existing knowledge aids retention. Utilizing mnemonic devices can also facilitate memory recollection. Regular self-assessment through mock tests can reinforce memory by stimulating retrieval. Maintaining a balanced lifestyle with adequate rest, nutrition, and exercise also contributes to improved cognitive function and information retention.