The basic principles of efficient note-taking for UPSC studies include clarity, conciseness, and organization. Using headings and bullet points can help structure notes, making them easy to review. It’s essential to summarize information in one’s own words to enhance understanding and retention. Incorporating visual elements, like diagrams or mind maps, can aid in remembering complex topics. Regularly revising notes after taking them ensures the information is reinforced in memory. Lastly, distinguishing between core concepts and supplementary details will aid in focusing on what is crucial for the exam.