I've started doing a few different things in an attempt to reign in our food budget:
 
1. I've started doing a Square Foot Garden to grow things mostly for canning and to supplement our CSA share. I'm hoping I can can (I'm not sure how else to say that, lol) lots of tomato-based sauces that we use regularly - salsa, pizza sauce, pasta sauce. Seems like we go through a LOT of that. The recipes I have are for using the hot water bath method. I'm still intimidated by pressure canning and I don't want to purchase the equipment for that.
 
I'd love to have a "canning party" but I have no idea where. We'd almost need an industrial kitchen. It seems like it takes up a lot of space in my teeny kitchen.
 
We're also growing potatoes & sweet potatoes to store for the winter.
 
2. Join a CSA. That is soooo much cheaper than buying organic veggies at the farmers markets or places like Whole Foods. And some CSAs will give you discounts on the eggs (maybe meats, too, but I don't eat that) if you're a csa member.
 
3. Make your own bread. I've been using the Artisan Bread in 5 Minutes a Day method. There's a thread in this section with some great links about it. Lots of free recipes so you can try it out. It's super duper easy and if you buy big containers of  flour it's really cheap. I simply mix up the dough in the morning (takes maybe 5 minutes) and throw it in the oven later. I'm not sure what I'll do when it starts getting super hot. Maybe make my bread in batches and freeze?
 
Along with that, we make our own pizzas. Even the premade pizza crusts you can buy in the stores are fairly expensive when you're feeding a big crew. I use the same method of rmaking my pizza crusts as I do for the bread.
 

I thought of a few more:

Replace your paper napkins and papertowels with cloth. Yes, it's an upfront cost, but it can be a fairly inexpensive one. To replace the papertowels, I just bought a few packs of plain white washcloths from Target. I bought some plain white napkins from Bed, Bath & Beyond on sale. I can't remember how much they were because we did that a few years ago. They're a little stained now, but they're for everyday use so it doesn't really matter.

Eat oatmeal for breakfast. Even generic commercial cereals can be expensive compared to a big container of old fashioned oatmeal. It cooks in the microwave for only 2 1/2 minutes and then you can control the amount of sweetener. My daughter and I have been eating that for a long time now. You can also make granola out of it. And granola bars. That's great for us since we're dealing with food allergies.