Make a wish list beforehand.
You know that blazer that you were eyeing last season that was sold out in a week? You know, the one you went looking online for until 3 a.m. to no avail? It'll probably be at the sample sale. The sample sale is your last chance to buy the piece you were dying to own first hand. Put your priorities and budget in order to make sure that you pick up the piece you absolutely need. Everything else you buy at the sale is collateral.