Red Tag Sales
Just because there's a sign that says "sale" doesn't mean you've found a bargain. Some less-than-honest retailers have been known to drop the prices by only 1 or 2 percent (or nothing at all) for an excuse to put up promotional signs and stick enticing red tags on all their merchandise.
Find out what the normal list price of an item is, and compare it to competing retail chains and online stores before you buy. If the sale price is 10 percent off or less, find a better deal.