Using coupons is a great way to save money. Another quick tip would be to buy on sale. Now before you rush out to Macy's let me explain. Every week grocery stores will circulate ads in the local newspaper. Instead of just making a grocery list and then going to the store, spend some time looking for coupons, also browse the grocery sale ads for items you may not need right now, but will need in the resonably near future and buy them while they are on sale. By combining the 2 strategies you can save as much as 60 - 75% on your food bill. Don't be embarrassed to use coupons, I know one lady who has literally had other shoppers, behind her in line, ask her to do their shopping for them when they hear how much she saved. Who knows, could be a great way to make extra money too.
Here's another quick tip, always check your receipt and watch the checkout register as your purchases are scanned. You will be surprised at how many items ring up for more than they should or how many coupons don't get credited properly.