Calling it quits: When leaving your job is the right thing to do

Many Americans with full-time jobs say they daydream about leaving those jobs far behind. But giving up an unsatisfying career (and the paycheck with it) is not just a fantasy, say those who have experienced the joy of quitting. Tony Dokoupil talks with business and financial writers Seth Godin and Michelle Singletary, and with two people who left their jobs, and never looked back.