It's quite simple. Next time you're at the grocery store, buy long grain white rice. Then prepare a bunch of it, and store it in ONE-CUP containers in the refrigerator. EVERY single day, every person in the family MUST consume one cup of the white rice, more if they want it. LOL
It's amazing how filling that stuff is, but you might not notice the very first week, but by the end of the second you will. It frees up lots of the grocery budget, if you come across something at a fantastic price, but just can't afford, you actually CAN make room in the food budget.
Another thing about eating a cup or two of rice daily, is that you'll have a far better idea of how your family can truly exist foodwise on long tern storage foods.
I've also read on some of the frugality websites that another way to save money is to buy large quantities of Rice Noodles at oriental grocery stores, and that if you research online, you can sometimes find bulk items your family likes becoming far cheaper if you purchase a very large bag -- e.g., one hundred pound bag of white rice is much cheaper per serving than 50 of the two-pound bags at the grocery store.
Good idea if you can get to it all before it spoils.