To improve writing skills for UPSC exam answers, candidates can employ techniques such as structured outlines and clear thesis statements. They should practice writing concise yet comprehensive paragraphs, ensuring clarity of thought. Regular essay writing and attempting past paper questions can bolster skills in coherence and argumentation. Reading exemplary answers from previous toppers helps in understanding effective expression and presentation styles. Incorporating critical feedback from peers can also refine writing, while continual practice enables candidates to develop their unique voice that resonates well with exam evaluators.