So last week, I attended a talk by Harvard Business School professor Clayton Christensen, who shared this story: Back in the day, Christensen used to work with the Boston Consulting Group. Now as you know, consultants pretty much live and die by their presentations. Christensen’s team had a critical presentation to a client coming up on Monday, so his boss asked the team to come in to work on Sunday. This was bad news for Christensen. He’s a deeply religious man, and had previously made a commitment that he would spend every Sunday worshiping God. This meant that he couldn’t work on Sunday. He had no choice but to tell his manager. His manager pulled him aside and went, “Look around you. Every single person in your team is coming in to work on Sunday. This is an important presentation; you’ve got to do it. Just this once, under these ......