I am signed up to a online digression called the cheapskates club. That's where I first heard of it. They have lots of helpful ideas to achieve this. I shop around and go to a fruit and veggie shop, butcher, aldi, Coles, and woolworths and get the cheapest from each shop. I bake all my kids lunch box and snacks as I have a asd child so I have completely gotten rid of processed food out of his diet. We have oats for breakfast everyday except on day on the weekend where we have homemade pancakes and lunch are sandwiches where we get the bread for free as my mum works at a bakery so brings me the leftovers. I do a basic fruit and veggie shop when I need it and use long life milk when the fresh milk is all used.