Recommended strategies for the essay paper in the UPSC mains include developing a clear thesis statement and structuring essays with an organized introduction, body, and conclusion. Candidates should focus on the clarity of expression and relevance to the topic, articulating arguments effectively. Incorporating examples and real-world applications enhances persuasiveness. Additionally, practicing diverse topics fosters adaptability in thought processes and writing styles. Lastly, managing time efficiently during the writing process ensures that candidates can thoroughly plan, draft, and revise their essays within the given timeframe.