My job used to have me driving alot also and my best idea's used to come from that solitude. Unfortunately a lot of it was lost b/c once I reached my destination I had no time to write it down before the work questions started coming at me. My solution was also to bring along a recorder as I had been using one at home in my music room for years. I don't know why it took me so long to think of it for driving...some of my better songs came from me listening back to recordings that I did. When your mind is on cruise control your brain doesn't have time to get in the way. Of course now my drive is only about 30 minutes total for the day. P.S. The recorder idea doesn't work as well in traffic mostly on road trips though its great...unless you are one of those people that doesn't realize how angry you get when in traffic, perhaps when you hear it later you will see just how much you need to mellow out ;)