FOOD INC! Demand to know where your food comes from & what is in it. If you eat meat, consider what the animal is eating and how it is raised. If the good food is more expensive, eat less! Read labels and insist upon their accuracy. Be good to yourself and the environment. Every item that crosses that checkout scanner is a vote for the type of resources you'd like to consume.
http://www.youtube.com/watch?v=5eKYyD14d_0