If you love J.Crew like I do and you live anywhere near Asheville, it's worth the drive. Trust me on this.

Be prepared to wait in line. They allow only a certain number of folks at a time. Silly fire codes. 
Wear a tank top and leggings so you can try on clothes over them, as there are no dressing rooms available.  You'll receive a garbage bag and a price list when you enter and you're free to dig through boxes upon boxes of J.Crew goodness until your heart's content. Or until your blood sugar drops. Or at least until you come off your J.Crew sample sale high. Another note: they surprisingly do NOT take J.Crew credit cards in the warehouse sale, so don't bother bringing it.