The serious shoppers come out this time of year—we're talking the digital equivalent of throwing elbows at a sample sale—so if anything catches your eye, put it in your cart immediately! You'll have 10 minutes to decide if you really want it instead of being disappointed at watching something disappear while you deliberate.
Vera Wang Dress, Gilt Price: $199 (original retail $995)
2. Don't be blinded by the discount.
To avoid buyer's remorse, ask yourself, "Would I still want this if it were full price?" (the key word being "want," not "afford"). If the answer is yes, you've found yourself a bargain.