To improve writing skills for the UPSC, candidates should focus on regular practice and seek feedback. Start by writing sustained essays on various topics, followed by self-evaluation and critiques from peers or mentors. It’s essential to articulate thoughts clearly in a structured format with a defined introduction, body, and conclusion. Reading quality articles, including editorials, enhances vocabulary and comprehension. Additionally, practicing answer writing for previous years' question papers under timed conditions builds speed and confidence. Incremental improvement and consistent review of one's writing style can significantly bolster performance in the exam.