The 80/20 rule: Focus on the 20 percent of tasks ... and overpriced ticket sales. Like today’s motivational speakers, the Sophists knew that success hinged on skills, adaptability, and persuasion.

A story is told of a motivational speaker who was invited to speak at a social gathering on the understanding that he would be paid Sh30,000. He was paid the initial deposit of Sh5,000. When days ...