I just read an article on CNN that I wish everyone would read. It covers something that many of us already know: slowing down saves cash and costs little time. While I have been known to lead-foot it some times, I tend to try to stay at the posted limit. The article for me was just a reminder to do that more often.
I do find it interesting that one person interviewed in the article says that she has no incentive to slow down, and that she's always late. A little time management goes a long way.
So, plan you day better, know when to tell bosses and clients "sorry, I can't be there", and slow down to the posted speed. If you're on a road trip, take a little bit longer to enjoy the sights along the road. I'm sure you'll be glad you did!