A quick 500 HHonors points
Almost not worth the effort for only 500 points, but the effort is minimal enough that it doesn’t suck too much. Go to the Hampton FaceBook page, like it and watch a video. Get 500 points a few weeks later. The promo ends 12 October 2012.
There’s also a similar promo from DoubleTree and TopGuest. Some folks have reported trouble getting credit from both.