Aspirants can develop their writing skills for better answer presentation in UPSC by practicing regularly with a focus on clarity and conciseness. Engaging in mock writing sessions can aid in refining response structure and argumentation. Getting feedback from peers or mentors and analyzing model answers can provide valuable insights. Writing summaries of study topics and practicing with previous year's questions can further enhance articulation. Developing a personal style while adhering to exam formats ensures that responses are engaging, relevant, and reflective of a strong grasp of the subject matter.