Mastermind

What is it that separates Sherlock Holmes from his long-suffering friend and side-kick Dr John Watson? What makes Holmes such a superior detective, able to piece together clues and solve problems that seem elementary to Watson only in hindsight? And can we - most of us Watsons ourselves - ever harness a bit of Holmes' extraordinary powers of mind, not to solve crimes, but simply to improve our lives at work and home?