To improve answer writing skills for the UPSC mains, aspirants should practice writing regularly, focusing on clarity, coherence, and conciseness. Utilizing a structured format—introduction, body, and conclusion—can help in organizing thoughts. Candidates should also analyze previous year answer sheets to understand expectations and evaluate their writing against top-scoring answers. Time management practices during essays or writing drills can enhance speed and efficiency. Incorporating feedback from mentors or peer reviews provides valuable insights for further refinement.