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Pay attention to extra costs
Sometimes, what you see isn't really what you get. Shipping, handling and taxes can easily double the cost of a low-priced holiday gift, says Dworsky.
"Recognize that the attractive price on the website may not include those extra costs, and sites may not disclose those fees until well after you've put the item in your cart," he says. "If it costs you an extra $10 to buy a single $10 item, you're not getting much of a deal."
Before you click "buy" on Cyber Monday, make sure you know the final cost -- and how it measures up to deals at other sites. That's the only way to save money.