Innovative practices to boost retention of case studies pertinent to UPSC include using storytelling techniques to connect emotionally with the content, making it easier to remember. Visual aids like charts, diagrams, or infographics can simplify complex cases and enhance recall. Regular group discussions allow for diverse interpretations and deeper understanding of case studies. Creating flashcards summarizing key points can also facilitate quick revision. Utilizing digital tools like apps or platforms for quiz-based learning makes retention interactive and engaging. By adopting these innovative practices, candidates can significantly improve their grasp of case studies essential for effective preparation in the UPSC exam.