Starwood is offering up to 50% off of bookings made by July 20 for stays between July 16 and October 20. Now, this is up to 50% off of rack rate, which means it will sometimes be a small savings off the rates you’ll otherwise find from Starwood’s website. But it’s worth checking rates under this promo. The rates are available in North America, South America and Asia Pacific. Some hotels place a 4 night maximum stay under the rate, and seven nights generally at resorts. They’re advance purchase, non-cancellable rates.

Another interesting offer is Starwood’s $100 spa credit per night offer for hotels in the Southeast, Florida, and Carribean. Bookings must be made by July 31 for stays through September 30. Rates will likely be a bit higher than booking without this package, but if you have designs on a spa you’ll likely get some significant benefit. As always, compare the regular rate with the promo rate to see whether it’s worth it in your case. (Hat tip on this one goes to Laura.)