When approaching the CSAT paper in UPSC prelims, candidates should familiarize themselves with its structure and focus on both quantitative and verbal sections. Prioritizing practice through previous years' papers can reveal patterns in question types. Developing a solid foundation in reading comprehension is essential for understanding complex passages, while brushing up on mathematical concepts helps tackle quantitative problems efficiently. Time management during the exam is crucial; using a timer while practicing can simulate exam conditions. Lastly, maintaining a calm mindset during preparation and the actual exam allows for better performance and decision-making.