It seems silly to create a new thread every time we find a new J Crew $20 off $80 coupon code, so I'll just keep adding them here.
J Crew Coupons:
ALMOSTFALL - 25% Select Styles + Extra 25% Off Sale Styles (Exp. 8/28)
Don't forget to place your order on the "catalog phone" available in most J Crew b&m's to get free shipping too.