Effective techniques for compiling and retaining study notes include summarization and categorization of information. Using bullet points, diagrams, and mind maps can enhance visual retention. Active engagement while noting—like paraphrasing and questioning content—ensures better understanding. Regularly reviewing and revising notes aids in long-term retention, while creating flashcards for quick revisions is particularly useful for key definitions and concepts. Additionally, employing spacing techniques and interleaved practice further cements knowledge. Ultimately, well-organized and actively reviewed notes become invaluable resources during final preparations for the UPSC exams.