Don't get stuck behind your desk all day. Unlike our railroad-laying, dawn-'til-dusk farming ancestors, many of us don't have jobs that require physical labor. If this is the case for you, try incorporating little exercises into your workday. Set a timer on your computer to alert you every hour. Stand up from your desk and either do a lap around the office or a strength move. These little bursts can add up to a lot of extra burned calories over the course of a week, month, or year.