What do I do after I preorder from Origin

I preordered Battlefield 3 off of Origin. I picked digital download, and now I have no idea what to do...
I got the receipt in my email, and it has no key whatsoever. Can someone tell me what to do step by step? And what to do when the beta is out?

For BF3 the game, you just wait until the release date and then the game will be available for download from Origin , you download the game, if there activation code needed it will be probably send to your email.
For BF3 beta i believe there's a registration for that at : www.EA.com/beta.

The reason why you don't have the key for the game yet is because the game ISN'T OUT YET!
Common sense, people. Use it.

You wait.