Effective note-taking for UPSC can be achieved through several methodologies like the Cornell Note-taking system, mind mapping, or the outline method. Candidates should prioritize clarity and organization, highlighting key terms and concepts to facilitate understanding and recall. Utilizing digital tools or apps can also streamline the process. Regularly revisiting and revising notes solidifies knowledge retention. Additionally, incorporating visual aids and summarizing information in one's own words enhances comprehension, making it easier to grasp vast amounts of information.