The Grocery Game is what helps me. Some people don't like it because it's a subscription service ($10 every 8 weeks; $5 for each additional List you subscribe to), but I easily save well over the cost of the subscription in one shopping trip. It's a time saver, you don't have to clip coupons until you need to use one (just file the inserts until the List mentions the coupon), and I know I'm getting the really hot deals or, even better, the free ones. Free 4 week trial, so you can see if you like it. Just a thought.

I've been a subscriber for about 6.5 years now and have easily saved enough to pay cash for a "cheap" car over that time period (and that's not the savings from retail to price paid, that is what I've said compared to my prior spending habits.)
Now if only I had saved that money, we wouldn't have the debt we do! 
Other than that, remember a few things...
1. DO NOT turn your nose up at coupons. Manufacturers are GIVING you money to buy their product.
2. Watch out for those temptation sales - the ones that really aren't that good, but you might buy it "because it's on sale". Wait. The price will go lower and you'll kick yourself for paying more.
3. Have coupons & a really great sale hits? Stock up! Don't be brand loyal unless you HAVE to be. You'll find a lot of great brands by trying something new & be able to stockpile for your family's need much better.
4. Just because it's store brand doesn't mean it's cheaper. Again, coupons + great sale = a LOT cheaper than store brand. Don't fall for that myth & don't perpuate it. LOL Now, if you need something and there's not a good sale or a good coupon to make a sale great, obviously, go for the store brand. But otherwise, you'll have better luck with a brand name.
5. Bigger isn't always better. Sure, a bigger box might have a better price per unit/ounce/whatever to start with, but if the small one is on sale and you have a coupon for it, you'll get a much hotter deal. Example: Box of 20 oz cereal is on sale for $4.00 - price per ounce is $.20. Box of 14 oz cereal is not on sale and is $3.00 - price per ounce is $.21. Without a coupon, sure, the 20oz is a better deal. But now throw in a coupon for $1 off 1 box. That 20oz cereal becomes $.15 per ounce while the not on sale 14oz box becomes $.14 ounce. Not a big difference in cost, but when you're watching every penny, it IS a difference.
6. Meal plan - and if you don't have a stockpile, then plan around your store's sales & what you have on hand. Do you really NEED boneless skinless chicken breasts that aren't on sale for $4.49lb? Or can you make a delicious chicken meal with the boneless thighs that are on sale for $.89lb? Think about the staples that you have on hand - what can you make with them? What can you buy on sale this week to make a meal with those staples?
7. Plan ahead!! This is a great time saver and can help lower your dining out costs. Ground beef or turkey goes on sale and it's a good price. You know that your family loves spaghetti with meat sauce or nachos. Buy several pounds, cook them up together, and then divide & freeze. Need a quick dinner one night? You can reach in your freezer, toss the frozen cooked meat into the pan or the microwave, boil some water & cook up some pasta, heat up sauce, and voila. Within 10 minutes, you're eating a homecooked meal. That's less time than it takes to have a pizza delivered - and a LOT less money. Try planning ahead with a lot of things - cooking up meats and freezing into meal size portions; buying produce on sale, prepping it for future use, and freezing it until needed (peppers, onions, etc. all can be frozen and are just perfect for cooking with down the road!); whip up a batch of dough for bread, pizza, rolls or tortillas - if you have the time, bake a few loaves then, if not, refrigerate for later (or freeze).
I'm more than happy to share dough recipes or any other time saving recipes with anyone. I bought Artisan Bread in 5 Minutes A Day and it has been a life saver. A loaf of bread costs me less than 25 cents a loaf. I purchase King Arthur All Purpose unbleached flour at BJ's - 10lb bag costs me $5.79. I get my yeast from BJ's, as well. A two-pack of bricks costs a little over $3 (I'm still on the first brick and I've had it about a year now) and I only need 1.5tbsp per batch. A 3lb box of Kosher salt costs me $3.59 (not on sale) at my local food store, but I only need 1.5 tbsp of it. Total cost for one batch is ~$.93 and each batch makes four 1lb loaves.

Hope this helps!