In a fast-paced business culture of "get everything done yesterday," it's easy to admire and reward those busybusy people who always seem to be juggling 14 things at once. But business coach Dave Crenshaw argues that the most common kind of multitasking doesn't boost productivity—it slows you down. In his new book, The Myth of Multitasking: How "Doing It All" Gets Nothing Done, Crenshaw explains the difference between "background tasking"—like watching TV while exercising—and "switchtasking," ...