Effective note-taking strategies for UPSC aspirants include using techniques like the Cornell method, which organizes notes into summaries, key points, and cues for easy review. Mind mapping can also enhance understanding by visually linking concepts, allowing learners to see relationships among topics. Utilizing bullet points or numbered lists helps distill information into digestible segments, making review more efficient. Regularly revisiting and revising notes ensures retention of information. Additionally, integrating personal reflections and insights can deepen understanding and make notes more engaging. Ultimately, these strategies contribute to better organization and retention of vast information crucial for UPSC success.