1. What color you want. If you don't specify a color, you won't win.
2. Why you want this case!
If you'd like to read our review of the Qmadix Xpression Covers before entering, you may do so here:
Qmadix Xpression Cover case for Galaxy S3 review
And if you'd rather just go and buy yourself one instead of leaving it up to chance, you may do so at ShopAndroid here:
Qmadix Xpression Cover for Samsung Galaxy S3
Good luck! Contest ends Sunday night.