To improve writing speed for the UPSC exam, candidates can practice timed writing exercises, gradually reducing the time allocated to each answer while maintaining quality. Another technique involves creating outline formats for answers, allowing quick structuring of points before writing. Regularly engaging in mock tests further allows aspirants to simulate exam conditions, helping to build speed and accuracy. Additionally, focusing on key points rather than long explanations during initial practice can streamline writing flow, ensuring completeness without losing essential content in time constraints.