Rule #1. Don't bring a bag. You'll have to wait in line to check it and then again to pick it up. Come equipped with your wallet, and nothing else.
Rule #2. Since it's going to be hot outside anyway, wear the smallest, most slip-like dress you own. There aren't dressing rooms, and it's insanely crowded, so the less clothing you show up wearing, the easier it is to try on more.
Rule #3. Same goes for shoes — flip flops are ideal. Our fashion editor says, "Scan all the aisles of shoes to find the style you want, and then concentrate on finding your right size because they're usually mixed up and you can miss what you really want when it's hiding in the size 5's! Also, people stuff shoes in the back of the shelves behind the boots so check there"
Rule #5. Don't buy something just because it's on sale. As appealing as that wedding-like Rodarte dress may be, you're not going to wear it. (Though if you're still thinking about it come September 5th, chances are it's still there, maybe $400 cheaper and only slightly more torn.)
Image(s) courtesy of Barney's