One step we can take to becoming more self-sufficent is to have a garden. If you have some yard space, it will be a little easier. But, if you are in an apartment or somewhere with out one, you can still have a little garden. You can get some window boxes or large planter or pots to grow some fresh herbs. You might be able to grow a tomato plant if you have a big enough pot. Berry fruits would be good to grow.
I also see those special indoor pots for herbs an the ones that you hang outside and grow tomatoes upside down. I don't know how well they work, but you can find out.
If you have a backyard it will be a little easier to grow some things. Just try and think of what you use most. Check with your local nursery to see what you can grow without much trouble if you don't have a gree thumb. This should save money in the long run, it make take a small investment to get started) and you will know that you are getting fresh food free from chemicals and you will know exactly how it was handled, where its been, and how many people may have tocuhed it before it got to you kitchen.