For effective essay structuring in the UPSC Mains, aspirants should follow a clear outline that includes an introduction, body, and conclusion. The introduction should present the main idea and background of the topic, while the body can be divided into multiple paragraphs, each addressing specific points with evidence or examples. It is crucial to maintain coherence and logical flow, ensuring that each paragraph transitions smoothly. The conclusion should summarize key arguments and provide a reflective insight. Practicing this structure enhances clarity and effectiveness in essay writing.