Some pretty interesting responses, and a wide variety at that. That certainly implies that there is no particular hammer, though perhaps Mike's HOTM idea might fit!
My original idea in posting was that people tend to look at only one way to solve a problem, and rely too much on that solution; at some point, it becomes mundane and almost self-defeating. I'd argue that adding length, often seemingly as a knee jerk response to a particular club that someone hit into a green, is such a hammer.
Gotta think more about the responses, back in a bit.