Check out Map My Run on your cellphone. It's an application that you run with and it tracks your avg. minute per mile, mph, mileage, maps your route, and congratulates you at the end of your run. The best part of the application is that you can directly upload your stats onto Facebook. Then everyone can see how fast and far you ran and it makes you work even harder to do it even better the next day!!
It's a really great alternative to those expensive $100.00 wrist bands that track all the same information.