Candidates can develop effective note-taking techniques for UPSC subjects by using methods like the Cornell system or mind mapping. Structuring notes with key headings, bullet points, and highlighting critical concepts aids quick revision. Utilizing abbreviations and symbols saves time and makes information more accessible. Regularly reviewing and revising notes ensures they remain relevant and current, particularly as new information emerges. Additionally, organizing notes by subject or theme enhances coherence. Combining visual aids, such as charts and diagrams, can facilitate better understanding and retention of complex topics relevant to UPSC preparation.