This link documents to navigate to key functions using new Metro interface:

Common Management Tasks and Navigation in Windows Server “8” Beta

QUOTE: Options are available for installing Windows Server “8” Beta with a minimal user interface well-suited to remote management. For more information, see Windows Server Installation Options. In this topic:

Open the Start screen
Shut down or restart the computer
Lock the computer or sign out
Close a Metro style app
Access Settings for the current screen
Access Control Panel
Access Administrative Tools
Create shortcuts
Open the Run dialog box
Run a program as administrator or as another user
Open Server Manager
Start Windows PowerShell
Open Remote Desktop Connection
Open Command Prompt
Open Microsoft Management Console (MMC) and snap-ins
Keyboard shortcuts
Use keyboard shortcuts in a Remote Desktop session
Use keyboard shortcuts in Hyper-V virtual machines

Windows 8 Server Beta – home support page