Got myself one as my last shopping spree for last year

now I have 800 reward points or credits or whatever they are called? what to do with them noticing that most TV and Radio services are not available here in this region, so any suggestions?

Ohh and what's your gamer tag to add you

I have Kinect Adventures, You Shape, Avatar and Halo Reach, but it's my first time to Play Halo ever so I'm a little lost here and I'm just playing a Shoot'em up FPS any tips, hints, background story, or game I should purchase?