Improving answer writing skills for the UPSC Mains involves several effective strategies. First, candidates should practice writing answers regularly, focusing on clarity and structure. Utilizing model answers for guidance can provide insights into effective presentation. Additionally, incorporating keywords and phrases relevant to the question can enhance answer relevance. Time management during practice is crucial, aiming for concise responses within allocated time frames. Joining groups or discussion forums can foster peer feedback, improving writing skills. Finally, reviewing and reflecting on past mistakes helps aspirants refine their style and approach over time, enhancing overall performance.