Effective note-taking techniques for IAS aspirants include methods such as the Cornell method, mind mapping, and outlining. These techniques help in organizing information systematically, enhancing comprehension and retention. The Cornell method encourages dividing notes into cues, notes, and summary sections, promoting active recall and reflection. Mind mapping visually connects concepts, fostering creativity and critical thinking. Outlining helps in structuring notes hierarchically, emphasizing key points and subpoints. Additionally, using symbols, annotations, and color-coding can make notes more engaging and memorable. Regularly revisiting and revising notes further solidifies understanding, making these techniques invaluable for IAS aspirants.