I think a lot of people are trying to find ways to save some money, while still having a good lifestyle, and not going without necessities.
One of the things that I do is watch for sales, and stock up as well as I can afford when there is a sale on something that I use. I set up a shelf out on the back porch where I can put extra cans of food, and I have the plastic storage containers that I put dry food (bags of rice, etc) into.
The grocery stores will often mark down perishable foods like bread, fruit, veggies, and even meat items after the weekend, so you might find half-price on these items by shopping mid-week. They want to clear the old produce out' and on Thursday, will be restocking for the weekend, so Tuesday or Wednesday are good days for sales. You have to watch the stores where you shop, and see if they have markdown specials or not.
Another important thing, that I have discovered, is to check your receipt, and make sure you were actually charged the correct price for the food you bought. I find that the sale prices sometimes don't get into the cash register, so you think you got something on sale, but were actually charged full price. Some stores, like Kroger, will give you the item free if they ever charge you, so that makes it even more worth checking the prices.