I've updated my Hotel Promotions page with information on two fall promotions announced so far. While neither promotion is particularly lucrative, it's crazy not to register for these promotions when they pop up, since it's hard to know in advance when a revenue night will end up making sense for your travel needs.
Hilton HHonors: double or triple base points
Between August 1 and October 31, 2014, earn double base points on paid weekday stays and triple base points on paid weekend stays. Register for the promotion here and find the (long) list of non-participating properties here.
Marriott Rewards: double points starting with second paid stay
Between September 15 and January 15, 2014, earn double Marriott Rewards points (up to 25,000 bonus points) starting with your second paid stay. Register for the promotion here.
Register now, before you forget.