Prepare some material on general topics like development, women, education, healthcare, internet, technology, science, etc. Your material should include quotations, case studies, examples, government initiatives, etc.
Focus more on real-life examples rather than theoretical jargon. Even though many topics may seem like theoretical, you must write relevant, contemporary, current affairs-related stuff in your essay.
Even if your essay question is philosophical, your essay need not be so. It should be relevant to current times.
You should try to approach a topic from different angles like political, social, historical, environmental, ethical, etc.