In the final 15 days leading up to the UPSC Civil Services Examination (CSE) prelims, aspirants are advised to focus on revising previous years' questions (PYQs) instead of trying to learn new material. PYQs serve as behavioral templates that reveal recurring patterns in the exam. Familiarity with these questions can enhance recall under pressure. This period is crucial for refining knowledge rather than expanding it, as the exam rewards clarity and quick decision-making. Mock tests should be utilized to understand one's performance under pressure, emphasizing the types of mistakes made rather than just the scores. Additionally, current affairs should be connected to core concepts, as the exam tests the ability to integrate contemporary developments with static knowledge. Ultimately, the last phase of preparation is about achieving precision and clarity in recall, rather than broadening the scope of study.