Effective methods for researching case studies relevant to UPSC include exploring government publications, academic journals, and credible media outlets. Utilizing online databases and resources helps in locating recent and relevant case studies. Candidates can analyze instances of policy implementation or governance issues, drawing lessons applicable to their answers. Engaging with case studies through group discussions can provide different perspectives, enhancing analytical skills. Additionally, summarizing key takeaways from each case to connect with theoretical concepts aids in comprehensive preparation.