1. Understand the case study: Start by thoroughly reading and understanding the case study. Take note of key details, facts, and figures, as well as any challenges or issues mentioned.

2. Identify the key problem or question: Determine the main problem or question that needs to be addressed in the case study. This will help you focus your revision efforts and ensure you are addressing the core issues.

3. Analyze the case study: Break down the case study into its components and analyze each part separately. Look for cause-and-effect relationships, identify any underlying patterns or trends, and consider different perspectives or viewpoints.

4. Apply relevant theories and concepts: Connect the case study to the relevant theories and concepts you have learned in your commerce studies. Identify which theories or concepts can be applied to the case study and use them to support your analysis and recommendations.

5. Use real-life examples: Supplement your analysis with real-life examples or case studies from other companies or industries. By showcasing examples of how similar problems were addressed successfully, you can strengthen your arguments and recommendations.

6. Discuss potential solutions: Consider different possible solutions to the problem identified in the case study. Evaluate the pros and cons of each solution and provide a well-reasoned analysis of which solution would be most effective and why.

7. Practice answering case study questions: Find past case study-based questions from previous exams or practice tests, and attempt to answer them using the strategies mentioned above. This will help you familiarize yourself with the format and style of these questions, as well as refine your analytical and problem-solving skills.

8. Seek feedback and guidance: Discuss your answers and analysis with classmates, professors, or tutors. Seeking feedback and guidance can help you identify areas for improvement and gain valuable insights from different perspectives.

9. Time management: Develop a study schedule that allocates enough time to revise for case study-based questions. Break down your revision into manageable chunks and set deadlines for completing each task. This will help you stay organized and ensure you cover all necessary material before the exam.

10. Practice critical thinking: Case study-based questions often require critical thinking and the ability to analyze and evaluate complex situations. Engage in activities that promote critical thinking, such as debates, discussions, or problem-solving exercises, to enhance your skills in this area.