Rack rates (“full asking price”) for hotel rooms often prevail in Hawaii. Starwood is offering 50% off coupons for 13 Hawaiian properties.
Just click on the link above and e-mail yourself a coupon.
Update: Coupon terms and conditions say you need to be a United Airlines elite member (Premier, Premier Executive, 1K) in order to use this certificate. My best guess is that you won’t be required to show proof of United elite status. A simple “I forgot my card” should suffice even if you’re asked. But your mileage may vary.