I had a friend in college who had a notepad thing attached to his windshield so that he could scribble stuff when driving. At the time I was amused by it, finding it charactertisically anal. Today, as I headed towards the interstate for the long drive south, I wished that I had one of those too. Because I only seem to get good ideas for writing when I am driving. When I drive, I am brilliant, at least in my own mind.
Of course, that does not preclude getting into a stupid fender bender at some point.