We know, it's the new year and you just made a resolution to start going to the gym regularly for the fifth year in a row. But you really mean it this time, don't you? There's an intriguing way to make sure you stay motivated throughout 2012 -- the almighty dollar. And we're not just talking gym memberships, either, though you'll probably need one: an iPhone app called GymPact offers cash rewards if you honor your weekly fitness commitment and makes you cough up some of our own hard-earned money if you slack off. Here's how it works: you first make a pact on how many days you'll go to the gym each week (minimum of one day per week) and how much you'll fork out if
