Candidates can improve their decision-making skills for the UPSC exam through regular practice and situational analysis. Engaging in mock interviews and solving case studies can provide practical experience in assessing complex scenarios. Additionally, studying successful leaders and their decision-making processes helps aspirants understand various approaches. Reflective practices, such as journaling, allow candidates to evaluate their thought processes and learn from mistakes. Finally, participating in discussions around current issues enhances critical thinking, enabling candidates to articulate their views and make sound decisions under pressure, which is vital for the exam.