I came across below interesting reading which talks about A-Z things needed for becoming Microsoft Certified Master(MCM) in Active Directory. MCM is the highest level of Certification given by Microsoft for people who excel in a given technology. Current MCM is available for Exchange, SQL, Lync, Sharepoint and Active Directory.
http://blogs.technet.com/b/askpfeplat/archive/2012/05/21/so-you-want-to-be-a-master-eh.aspx
Hope you will find this informative.