I used to swear by the Pilot Varsity disposable fountain pen (amazon.com), but a few months ago I switched back to a plain old-fashioned wooden pencil for jotting down notes and doodles at work. I have to sharpen it by hand, but I find that using such a simple, unglamorous implement means I don't think about how I'm writing or what I'm using to write it with, and instead I focus simply on what I'm jotting down and then quickly move on.
As a keyboard jockey, what do you use when you do find yourself needing to write something down by hand? Or do you not care? (Am I silly to have an opinion about writing implements in the digital age?)