I could put them in a playlist, but I'm not big on playlists anyway, and I really can't use them if I'm traveling. When traveling alone, I've got to have songs from the radio most of the time. Someone else picking what will play next, otherwise I'd get bored and maybe fall asleep!

The only time I use a playlist is when I'm at the gym for my workouts, and then it's always the same playlist because it's not so much what I'm listening to that's important, but what keeps me grinding it out to the end of the workout.