Outlet malls in Waikele, Oahu, HI.
I *hate* shopping and getting dragged by the nose through malls but make an exception for this one. Have everything (apart from the mega sports barn which closed down) and I can get about 2 year's worth of shopping done in a day and not have to darken a shop doorstep for two years.
Been there, done that, the Outlets in Vegas were better. I think Hawaii has higher tax as well.
Also booze, as much as you can.
2 litre top shelf is $20-$25 you can get it from the WalMart.