Feeling useful as a third-year medical student

During my last call night, I worked with an upper-level resident who treated me more like a sub-I than a third-year medical student. "Go get a history and physical on this new patient in the ED. I'll see you in 20 minutes." I can't emphasize enough how much I appreciate this management style. He gave me a clear task, he clearly communicated his expectations of my performance, and those expectations were appropriately high. I'll go out on a limb, here, but I think that I was actually useful that night. This is something to hold onto given that I have felt decidedly not useful during much of third-year so far.