When I was younger I just ran.
Now that the collegiate days are in the rearview mirror and I've got a wife and kids, I just carry my phone if I want to listen to something. This sucks in the summer as I just carry it. In the winter when I have pockets not as big a deal.
But wanting to compete again and train more seriously I don't want to carry around a heavy phone anymore. Curious what most of you do.