Tools like outlining, brainstorming, and using structure templates can help in structuring essays for the UPSC Mains. Outlining main arguments and supporting points before starting to write clarifies thought processes. Utilizing an introductory paragraph that addresses the prompt followed by organized sections aids in maintaining coherence. Incorporating examples and data effectively strengthens arguments. Finally, practicing essays under timed conditions can enhance writing speed and clarity, ensuring candidates convey their ideas effectively within the given limits.