How It Works: One of the most irritating things about shopping is buying something right before it goes on sale. Thankfully, you don't have to suffer through that on Amazon: If you end up seeing a price drop after you purchased something, contact Amazon customer service through live chat, phone call, or email and they'll refund you the difference.

Things To Remember: This only applies to items shipped and sold by Amazon. The official policy says it must be done within seven days of your delivery date, but many people have had luck with a refund even after that time.