I watched Food Inc... Now what?

I watched Food, Inc. over the weekend. I was wondering the best ways to shop for good food and I just have a couple of questions:

1. Should I trust food that is labeled “organic”?
2. How can I trust that the ingredients are accurate?
3. If I’m curious to know how a food company is operating, how can I find that information? (For example: how does Sanderson Farms raise and process chicken?)
4. With so many companies “running” to make money from organic food, how can I be sure that they won’t half ass the organic food too?