To enhance their analytical writing skills for UPSC, candidates should follow several steps. First, they should practice writing regularly on diverse topics to build fluency and clarity. Additionally, it's beneficial to analyze previous years' mains answer sheets, focusing on the structure, argumentation, and coherence of high-scoring responses. Engaging in peer review sessions can also provide constructive feedback, while reading quality editorials and research papers helps understand various writing styles. Lastly, time management during writing practice is essential for developing the ability to compose concise, impactful essays within exam constraints.