I'm not telling! I'm not telling! Ok, you talked me into it.
For Hilton, I received a promotion offering double points and double miles at select hotels. It's only in the area I travel and I haven't heard it mentioned on the board, but it should be publicly available; these hotels list a 'Double Points/Double Miles' rate if they have it available when you make a reservation online.
With double points, I would get 20 points per dollar, plus the Diamond Bonus for 25 points per dollar total. For double miles it goes up to 1000 miles on AA, which is where I double dip. I also get 500 points online booking bonus, plus I should be getting a Golf bag from their 3-stay golf giveaway promotion.
At Starwood I received the Triple Play promotion, which gives me 6 points per dollar, plus the Platinum Bonus for 7 points per dollar. I also receive the Platinum Amenity and Online Booking Bonus (250+500) which when converted in at least 20k increments gives me around 1000 miles on AA.