According to Bach, shoppers are often greeted with a "wall of values."

"Very often, a supermarket will place items that are on sale, so you notice them, right when you come in the door," said Bach.

Although there's often a mix of national brands and generic, Bach said many times, a store brand is actually canned or put out by a national manufacturer. And in some cases, the Food and Drug Administration has regulations about what is actually in the product, like butter, so they're all about the same.

When it comes to produce, many shoppers know buying in bulk is often a better deal, but Bach said packaging can actually influence the price. When we put two comparable 3 pound bags of apples on the scale, one weighed in at 3 1/2 pounds, while the other weighed in at almost 4 pounds.

There's also a strategy when it comes to choosing cereal.

"You'll notice that if you have a child sitting in the cart, then the sugar sweetened cereal are going to be right at their eye level and those are very often some of the most expensive cereals," said Bach.

Bach suggests looking high or low for the bargains. She also said shoppers should be careful with the groceries at the end of an aisle.

"Many times, the store simply moves merchandise to an end cap because they know it will sell well there because people think its on sale. But then there are other times when the end cap is a genuine sale," she said.

Bach also said shoppers should be cautious of "companion foods," food products that are displayed together, but often one is on sale and the other is not. Chips and dip are an example.

"That's how they get you to spend more money," she said.

The same rule of thumb applies to products that are not food items. While they may be convenient for shoppers, that's where stores make their biggest profit.

Bach also reminded shoppers when there are "two for" deals, you can buy just one and still get the discount. Also, she said don't believe all the claims. Just because a product says it's offering you more for your money, unless you know the original price, you can't be sure you're genuinely getting a good deal And she added that shoppers should always check the "sell by" or "best by" date just in case.

"The store is allowed to sell anything past the date with two exceptions, you cannot sell liquid milk or baby formula past the expiration date on the product." Bach said.

And finally, Bach said stick to the strategy.

"Definitely you should not impulse buy, so have a list, shop from your list, comparison shop, make sure you get the most bang for your buck, and always bring your coupons."