"If I was going to repair my brain, I needed to practice doing nothing. So during my morning walk to the office, I looked up at the buildings around me, spotting architectural details I’d never noticed before. On the subway, I kept my phone in my pocket and people-watched — noticing the nattily dressed man in the yellow hat, the teens eating hot Takis and laughing, the kid with Velcro shoes. When a friend ran late for our lunch, I sat still and stared out the window instead of checking Twitter."