How do I build a quote, data and anecdote bank for the UPSC Essay paper?

An Essay bank is 15 themes × (8 quotes + 5 examples/data + 3 counter-arguments). Each theme fits one A4. Build it over six months from newspaper editorials, biographies, and Economic Survey one-liners. By the exam, you can write 2 essays in 3 hours without panic — you are deploying assets, not searching for inspiration.