Lately I’ve noticed that my favorite CVS hasn’t been very good at keeping their best sale items in stock. While most customers will get annoyed and give up, this might actually work to your benefit. Instead of just walking away, ask the cashier or any other employee for a rain check. CVS rain checks are sort of like the Holy Grail – you’ll get the sale price and any Extra Bucks that are supposed to come with the deal when the item is back in stock. And the best part – CVS rain checks never expire. If you want, hold onto it until you get a coupon for the item and you can really maximize your savings!