Not with your clothes (for now), but with the grooming products that you use!
Whenever you buy any sort of grooming product from the drugstore or the supermarket—even those you purchase off of a high-end boutique, look for the icon above with a number inside it. That's called the PAO—short for Period After Opening—icon, which tells you how long after you've opened that particular product before it expires.
Understand that this doesn't indicate the shelf life of the product, because that's what the expiration date stamp is for.
Once it's past the PAO period, the efficacy of the product goes south. While you can still use it for a couple of months more, if it's a year past the PAO, then please, throw it away already and get yourself a new one.
Photo from commons.wikimedia.org
