I'll cut straight to the chase here: 20% off everything at the HBO store in the month of October. This deal seems to good to be true, but it's not. You can get 20% off sitewide right now with this HBO Store Coupon. The offer says that 'some exclusions apply', but I've tried using it on a bunch of items and haven't been able to find any of the exclusions.
I'm going to use the code to buy the collector's edition of the first season of Game of Thrones. I don't have HBO at home so I've only seen the first couple of episodes, but I've heard enough people rave about how good it is to know that I'll like it. I have a penchant for fantasy, and it seems right up my alley. I was going to read the books first, but I don't have the patience. I can always read the books later on. I'm just not sure whether I want to buy it on DVD or Blu Ray . . . I don't have a Blu Ray player yet, but I know it's the format of the future and maybe it's time I got one.
The HBO store at store.hbo.com also has DVDs of all their other popular shows like Curb Your Enthusiasm, Eastbound and Down, Trueblood, Girls, Boardwalk Empire, Luck, Entourage, and Bored To Death, as well as HBO original movies. They also have a lot of other merchandise like T-shirts and mugs as well as some more unique items you wouldn't expect, like a Trueblood Sheriff's badge or a costume to dress up as Kenny Powers from Eastbound and Down, check the HBO store out, they have some interesting stuff.