For introductory essays in the UPSC exam, a few approaches can enhance effectiveness. Start with a clear and engaging thesis statement that outlines the essay's primary focus. Employ a hook, such as a relevant quote or a surprising fact, to captivate the reader's attention. Use a concise and structured format, ensuring the introduction sets the tone for the points discussed later. Provide context by briefly mentioning the issue's significance. Finally, outline key themes to be explored in the essay, allowing the reader to anticipate the ensuing discussion while maintaining coherence throughout.