While not new, I was a bit surprised at how much learning you can get done and how cheaply. You can learn almost as much driving (assuming say you drive for 2 hours a day) as you would if you had taken 2 university courses (and I'm being conservative).
One motivational speakers even said that pretty much everyone he spoke with managed to double their income in at most five year after doing this. I'd like to see where it takes me.
So have you given this a try?What do you listen to in your car?