From January 11-18 you can enjoy special savings up to 50 percent on Activision content. From Xbox Live Arcade titles, DLC for Guitar Hero, Call of Duty map packs, and more. On January 11th check your Xbox Live dashboard for more information.
Also, on January 18-25 you can get 50% off of various of Electronic Arts content, from XBLA games to much more. In addition to this Xbox Live will be free for 2 days starting at 5PM on January 28th. through January. If you only have a silver account you should definately check out the free 48 hour trial to see what your missing.
Finally, if you upgrade to an Xbox Live Gold Family Pack in the month of January you will recieve an additional month of Gold Family Pack (13 months in total), “Snoopy Flying Ace” and / or a Zune movie rental for free.