If you've been holding on to those 12 month renewal cards and haven't
applied them yet, now is the time. Double points for applying the 12 month
renewal card. Normal reward is 200 points (about $2.50) and now it is 400
points ($5).
January 1st - January 31st. Must be a Xbox Live Rewards member (which is
free).
Sign up for the rewards program if you haven't already:
Link: http://rewards.xbox.com