Here is a fantastic technet blog with the top Microsoft Support solutions for the most common issues experienced when using System Center 2012 Operations Manager (updated quarterly).

Definitely one to have a look through occasional to see what the top issues are, that are being experienced with SCOM.

http://blogs.technet.com/b/topsupportsolutions/archive/2014/02/04/top-support-solutions-for-system-center-2012-operations-manager.aspx

There are also similar support pages for other Microsoft products, http://blogs.technet.com/b/topsupportsolutions/

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