When preparing for the aptitude test in UPSC, candidates should focus on understanding the test format and structure. Familiarization with question types, including reasoning, numerical ability, and comprehension, is essential. Regular practice through mock tests and previous year question papers will help identify strengths and weaknesses. Time management strategies are crucial; candidates should practice solving questions within the allocated time. Developing a positive mindset and staying calm during preparation can enhance performance. Candidates should also stay updated with the latest exam patterns and effectively utilize study materials tailored to the aptitude test requirements.