Candidates can effectively summarize study materials for UPSC preparation by using techniques like mind mapping, bullet-point outlines, and concise notes. Focus on extracting essential concepts, relevant data, and important timelines. Incorporating visual aids can enhance memory retention and understanding of complex topics. Formulating flashcards for quick reviews can also aid in preparation. Regularly reviewing these summaries helps reinforce learning and ensures that candidates remain focused on key areas of the syllabus, while simplifying complex information into digestible segments for effective recall.