On the 11th of June I gave a LiveMeeting on how to get started quickly with SCOM 2012.
I started after a fresh install of SCOM and got through the routine of getting you started quickly by:
The webcast is available on technet.
Get it here: http://technet.microsoft.com/en-us/video/so-you-ve-successfully-installed-scom-now-what
This livemeeting was the first of many more to come in this series to get you up and running fast.