I recently gave a talk on the chemistry of strategy to the CEO Club of Boston. The talk was scheduled to start at 10 a.m. and to finish no later than 11 a.m. I’ve devoted the last forty years to this topic, so I could have talked for hours. But I didn’t. Why? Because I knew the people in the audience had planned their day around the meeting finishing on time. Many attendees had made commitments for later in the day -- follow-up telephone calls, other meetings, and delivery of projects they had committed to finish that day.