Project management skills contribute to effective UPSC study plans by enabling aspirants to create structured timelines and prioritize tasks efficiently. These skills help in breaking down the syllabus into smaller, manageable parts and setting specific deadlines for each section. By adopting techniques like Gantt charts or task lists, candidates can monitor their progress and ensure they stay on track. Additionally, project management fosters a disciplined approach towards revision, enabling aspirants to allocate time efficiently and work towards their goals systematically.