I have a Fitbit and my wife has one too. It counts daily steps, calories burned and total distance walked. Thanks to these little devices, we are both focused on keeping fit - plus by keeping active we get benefits from my wife's health insurance plan. That's the main reason we bought the Fitbits.
Now, Nike has entered the game. Fuelbands are WAY cooler - and this commercial is fantastic!
Check out one of these or some other exercise tracking device, they are great motivators!
Fitbit Website