Question: I have successfully Installed Configuration Manager 2012, with one Central Administration site and two Primary site servers. Okay, so what do I do next and where to start from?
Answer: This is well documented in the TechNet library and here is how I would prioritize a few must do things, after you install Configuration Manager 2012 site servers:
On the topmost site server in your hierarchy
To monitor Client Health:
10. Configure Alerts from Device collection properties (http://technet.microsoft.com/en-us/library/hh427334.aspx)