Concerned about food expenses? Not sure how you're gonna make ends meet? Try this game:
Don't buy any food.
I've done this before on at least two occassions, and found out I had enough food for MONTHS. I would just eat what was in the cupboards. Okay, its a slight exaggeration to say I didn't buy "any" food--I'd still buy milk or an occassional ingredient to finish out a recipe.
It was fun to be creative. Just when I thought I had exhausted all possibilities, an idea came that brought a week's worth of cooking. No matter how bare you think your cupboards are, there is most likely a stash that could keep you eating well for a long time.
Its actually a good exercise even if you're not driven out of necessity, for its good to rotate your stock and keep the items fresh.