Aspirants can effectively prepare for the essay paper in UPSC Mains by focusing on diverse topics and practicing structured writing. Regularly review current events and societal challenges to generate relevant ideas. Formulate outlines for various essay topics before writing, organizing thoughts logically for clarity. Focus on clear introductions, coherent body paragraphs, and impactful conclusions. Practice under timed conditions to develop speed and coherence. Additionally, seek feedback from peers or mentors on essay patterns and writing style. Analyzing previous years’ essays can also help understand expectations and improve overall essay quality.