SPG has a new promotion starting October 1 “Better by the night”, you can sign-up here.
Here’s the lowdown, basically it’s a points multiplier promotion; also if you have an iPhone, use the SPG App to book your room:
Double Starpoints® on eligible stays of 1 or 2 nights
Triple Starpoints on eligible stays of 3 or more nights
Register by November 30 and stay October 1–December 20, 2012, to earn unlimited Starpoints at more than 1,000 participating hotels and resorts worldwide.
BETTER YET — BOOKING BONUSES.
Registered members can also earn bonus Starpoints at all 1,100 hotels and resorts in the SPG® program:
250 Starpoints for eligible stays booked at spg.com
500 Starpoints for eligible stays booked through the SPG App for iPhone®
I wouldn’t run out and book all of your stays with SPG, but if you’re planning on staying with them anyway, a nice way to pad you account with some extra Starpoints.