In case you need any more encouragement to grow some of your own food, here's a passage from the always insightful, ever inspiring Wendell Berry:
"If you have a yard or even just a porch box or a pot in a sunny window, grow something to eat in it. Make a little compost of your kitchen scraps and use it for fertilizer. Only by growing some food for yourself can you become acquainted with the beautiful energy cycle that revolves from soil to seed to flower to fruit to food to offal to decay, and around again. You will be fully responsible for any food that you grow for yourself, and you will know all about it. You will appreciate it fully, having known it all its life."
Remember, you don't need a huge yard or a traditional garden space to grow your own food. Find any spot with some sun and a little soil (this can be a container, of course) and you can grow some food. Don't have much sun? Grow a little lettuce, arugula, kale or chard. These don't need as much sun as a tomato, and will make you feel very successful.
Need more of Mr. Berry's inspiring words? Read more of his thoughts on The Pleasure of Eating.