One of my insights from six months of daily 30-mile highway commutes was that most of the time we overestimate how much time we will save by going faster. In the mornings sometimes I watch myself and others hurl ourselves towards the train station, the office, the elevator at breakneck paces, as though we can transport ourselves to our destinations immediately through sheer will. Once in a while, though, I take the stroll from the train platform down the stairs to the street and through the alley to my office building at a leisurely pace, and suddenly the mindless urgency all around me seems insane. On those days, I meander into the office at about the same time, plus or minus maybe thirty seconds.