Back in 1978, Sony prototyped the first Walkman, a little cassette player with headphones for private listening on the go. Then smaller, better, cheaper: today there's no reason whatsoever when jogging or biking or riding a public conveyance to listen to the actual world around you. They even have these noise-cancelling headsets that wrap you in a spooky silence that feels like your skull is turning inside out. But really, the entire world you live in fits nicely into a baseball cap. And for me at least, that's where all the racket is coming from. I need a noise-cancelling mindset.