For writing concise and effective answers in UPSC Mains, aspirants should adhere to a structured format: Introduction, Body, and Conclusion. Using clear, straightforward language is essential. Candidates must first understand the question thoroughly and address it directly, avoiding unnecessary details. Focusing on key points, providing data or examples, and maintaining clarity is crucial. Practice writing within time limits allows candidates to enhance their ability to express ideas succinctly. Regular feedback from mentors on answer-writing techniques can further help in refining skills, ensuring responses meet the expected standards.