Since I usually travel alone, I don't have the problem of just sitting and staring out the window, but I do get bored. I listen to talk radio, preferably NPR. I listen to favorite music. But my favorite is to listen to books. I check out audio books from the library. They can either be the actual books on cd or I download them through a library program called Overdrive. I really like Overdrive because I can download a new book any place.