Should I buy compilations of current affairs or make my own for UPSC?

The most efficient strategy is a hybrid approach: rely on professional compilations for factual data while making your own notes for complex, analytical issues.
Coaching compilations (like Sleepy Classes, Vision IAS PT365) are superior for time management. They consolidate scattered news into syllabus-aligned themes, saving you hours of daily manual work. They are perfect for tracking factual details like government schemes, reports, and international summits.
However, making your own notes is essential for the Mains. Writing your own summaries of editorials forces deep processing and helps you develop the unique perspective and vocabulary needed for high-scoring answers. Self-made notes are also easier to revise during the high-pressure days between exams.
Use compilations for factual consolidation to ensure you don't miss minor details. Simultaneously, maintain a digital notebook (like OneNote) for major recurring issues, focusing strictly on "Pros, Cons, and Way Forward."