[2016-04-07 13:00:00] Anders Ericsson has spent the last 30 years studying virtuoso musicians, champion athletes and other exceptional performers to learn how they became great. This hour, we’ll talk with him about what it takes to make it from average to excellent, the topic of his new book, “Peak: Secrets from the New Science of Expertise” (Houghton Mifflin Harcourt).