I can offer some of the cheapest places to shop and other tips .Rule of thumb---compare prices on everything ----usually by the oz.
Town Talk in FW---surplus food warehouse with some great buys.You never know what you will find! Even organic and gluten free things pop up often. Watch the expiration dates if you do go--especially on chips. Most frozen things will be expired but they have told me that everything is frozen prior to the expiration date and I've never had a problem.
Big Lots
Dollar Tree and 99 cents store (the one that's white store with pink and green stripe)
Sam's Club
Save A Lot.
I scour grocery ads for meat sales and try to always buy chicken at less than $1 per pound---usually easy to get wings, thighs or legs. I try to buy fruit in bags and in season. Also buy some frozen fruit.
Buy Great Value (WalMart) pizza instead of ordering out--the chicken, bacon & ranch one is especially good!
Eat baked potatoes with all the toppings and/or soup once a wk and it's a really cheap but filling meal!
Order only off dollar menu at fast food places.
Split meals at restaurants.
Go to www.entertainment .com and get a coupon passbook for your area---we get one yearly!
Use coupons (especially at grocery stores that double and triple coupons) if you're up for clipping----I don't have the time usually but do use some for restaurants.
For gas, google the cheapest gas in your area before you buy.
Join yahoo freecycle group.
Go only to the dollar movies (Cinemark 8 in N Richland Hills)---all the movies get there eventually.
Pick up FW Child magazine and Suburban Parent (I think those are the names)usually at a local library for things to do monthly.Also check out kid stuff on guidelive.com
Hope this helps! It's not easy, especially in this economy, but we believe it's so worth it for me to be able to be home with our little one. Blessings and all the best to you!