Gathering data sources might seem like a hefty task, but it’s the foundation of a rock-solid SEC 13F filing. Why is this important? It ensures every data piece is accounted for. Imagine missing critical data—catastrophic! Use reliable resources and verify these sources extensively. Feel free to explore beyond the ordinary: contacts, databases, and more. This task can truly pave the way for a smooth compilation process. What do we need? Think databases, secure access, and determination.