Chade-Meng Tan

Chade-Meng Tan was employee No. 107 at Google. But the software engineer's career took a turn when he began teaching meditation to the company's employees and executives, adopting the job title of "Jolly Good Fellow." While he's no longer at Google, Meng -- as everyone calls him -- continues to meditate and has written a new book, "Joy on Demand," detai…