Candidates can efficiently transition from preliminary to Mains preparation for UPSC by adopting a strategic study plan. This includes analyzing previous year papers, focusing on answer writing skills, and understanding the syllabus depth for Mains. Candidates should prioritize revision of the General Studies topics while integrating optional subjects methodically. Timed mock tests and focused feedback are crucial in honing writing speed and clarity. It’s essential to regularly assess progress while integrating current affairs to stay relevant with evolving themes in governance and policies.