One of the most trivial mistakes I make has the capacity to derail my day: I go to bed, I brush my teeth, and I forget to charge my smartphone. I wake up to a phone with 20 percent battery, no time to charge it before I have to rush out the door and get on with a long subway commute during which I answer my emails as I go. By the time I am in the office, my phone is near dead — and I forgot my charging cable.
