The attorney general of the state of New York has gone after CVS and Rite-Aid for repeatedly selling expired goods on their shelves, including OTC medications. This has long been a problem in retail, but this is perhaps the first time that it has ever resulted in a lawsuit.

In 2005, Clark himself found OTC medications that were 5 years past their expiration dates on the shelf of a third chain drugstore. He was so fired up that he brought it to the manager's attention. Unfortunately, the manger was underwhelmed by Clark's complaint and didn't seem to care.

Recently while in a warehouse club, Clark discovered expired soft drinks on the shelf. He found an employee and showed them the items. But when he came back a week later, they were still there.

Clark doesn't believe there's any conspiracy to sell us spoiled food. But you must be your own police officer and check expiration dates before you make a purchase.

In fact, the penny-pinching guru describes himself as "obsessive compulsive" when it comes to checking dates. He routinely digs around on the shelves to get the latest possible date on milk and medications.

One caveat: It's difficult to tell if the date is a "marketing expiration date" or the real deal. Some drug makers put an early date on their products to get you to throw them out and buy more.

How would you like to go in the store and buy meat that looks good yet is actually very old? Meat producers have figured out that by injecting packaging with carbon monoxide gas, they can make meat look perfect even way past its expiration date. Supermarkets have long wrestled with the problem of meat that looks spoiled even when it's good. But now that the processors have this new method, Clark thinks this is taking things one step too far. The Washington Post reports that there's also corruption at play here. Internal memos from the big meat handlers show that this process hasn't been proven safe. This, of course, embarrasses the FDA, which seems to be failing in its mission to protect consumers. Target is one retailer that sells meat that may be packaged with carbon monoxide. Target says it's looking at adding labels to the packaging that would disclose the treatment. But Clark says this is not enough. He still bristles at the idea of using carbon monoxide to make meat look good.