I can't really start or contribute to a little side-project when I'm standing in a tram, sitting in a train for 15min, or waiting at the gate / before liftoff d

I can't really start or contribute to a little side-project when I'm standing in a tram, sitting in a train for 15min, or waiting at the gate / before liftoff during a flight. I can read my company email from my phone during that time.