Team Driving And Hobbies?

I'm thinking about going team. I'm sure this is answered elsewhere here, but I cannot find it. I'm just curious, for anyone who is driving team and not married to the other driver, what do you do when the other person is driving (besides sleep)?

I know you don't want answers from those who team drive as a couple, but I'll answer anyway because I'm obnoxious. I read books, drool at houses I can't yet afford on Zillow, and surf on my computer. Recently I've been trying to learn to code video games in Unity. My boyfriend plays games on his phone or Xbox, drools over guns or parts for his car he can't yet afford, and plans his next fishing trip. Many (sedentary) hobbies are quite doable while the truck is moving, as long as your hobby isn't painting Faberge eggs or building card houses.