I stumbled upon this website this weekend and it's so great! The 10 Percent Campaign is an initiative to grow the NC's local food economy by challenging people to spend 10% of their existing food dollars on locally grown foods.
Check it out and Sign up: The 10 Percent Campaign
Each week, you provide a little info about how much you spent on local food and where you got it. You can view your progress through the weeks, or see how you compare with other people in your area, in the country, or of the same household size.
This is pretty great. You should sign up!