A colleague of mine today learned me this neat shortcut: typing windows key + x on the Windows 8 Consumer Preview gets you a small menu with a lot of frequently used mmc’s. See for your self:
I especially like the “Command Prompt (Admin)” and “Network Connections” options. I’ve been using “ncpa.cpl” as a shortcut for network connections every since I started working with Windows 2008. But this might even be faster/easier.