Hard to believe it is a correct statement as the Xbox Live Service has turned 10 years old as I remember being accepted to the Beta to test the service. To celebrate the 10 years Microsoft is hosting a giveaway where you could win one of five grand prizes which is a limited edition custom Xbox 360 or other various prizes such as Xbox live memberships and Xbox Music Memberships.
To enter for a chance to win all you have to do is download the Xbox Live A Decade Of Entertainment Gamer Pic which you can head over to the Xbox Live Anniversary page where there is a link. You can also just look for the entry tile on your Xbox 360
Dashboard and enter through the console.