Aspirants should explore various resources to develop a strong opinion on economic issues for the UPSC exam. Key sources include government reports, economic surveys, and reputable newspapers or journals like The Economist or Business Standard. Additionally, understanding concepts from standard textbooks can provide foundational knowledge. Engaging in discussions with experts or participating in economic forums can also enhance critical thinking and broaden perspectives. Following current events and trends through multimedia platforms enables candidates to contextualize economic principles within real-world scenarios, strengthening their analytical skills.