Wow, I just scored using Hotels.com.
The hotel/room type I wanted was $149 ($171.64 all in) everywhere else, but I got a Hotels.com summer sale email yesterday, clicked through and the same room is $112. Then, on top of that, I used a 10% off code, plus the Amazon Prime Day $50 Hotels.com gift card I got for $40, and the total came to $68.16 (add in the $40 actually spent for the gift card), the $171.64 room is a $108.16 room.

(<--- me, pleased as punch)
So, let me post this from my desktop, then edit with a screenshot of the coupon codes. BRB.
And I booked using Ebates which will give me 3% cashback.
http://www.ebates.com/coupons/hotels-com/index.htm