Run 4 Good

I'm not typically a big fan of mobile fitness apps but this one is pretty sweet. The RUN4GOOD app by Saucony lets you set monthly mileage goals collectively with other users. If a group of users reach or exceed the goal Saucony will double it's standard donation to youth fitness programs that help prevent childhood obesity.

Any type of motivation helps when you're out there running everyday, but charitable motivation might be the best.  Check it out...