What is the best way to revise current affairs of the past one year for UPSC?

The best way to revise a year’s news is to shift from monthly reading to theme-based consolidation.
1. Annual Compilations: Instead of re-reading twelve magazines, use annual booklets. These re-organise the year’s news by subject, making it easier to see the evolution of specific issues. Aim for at least three readings: one for understanding, one for highlighting, and a third for memorisation.
2. Static-Dynamic Linkage: Integrate news into your static subjects. If you are revising "Monetary Policy," immediately check for the past year's RBI repo rate trends and inflation data.
3. Active Recall: Use subject-specific mocks and Previous Year Questions (PYQs). UPSC often asks for the static background of a current event, so testing yourself helps identify these hidden links.

Focus on high-yield subjects like Environment, Economy, and Science & Tech for maximum impact.