The following step-by-step guide is provided by Microsoft SQL Server CSS engineers based on the CTP version of SQL Server 11 or code-name Denali. The guide can be found here.
I urge you to read it and just note some of the specifics which probably will not be changed upon final release of the product. I am talking about things like HADRON instances are stand-alone instances, you must first enable the feature on service level and creating availability groups. Some of the screens/features/setting might be changed or removed by the time the RTM is released but still this is as much as we can get with the current version.