Over on the The Configuration Manager Support Team Blog, there's write up on ConfigMgr Documentation topics that are currently in demand. The list is a bit empty right now, only refering to the Prerequisites, but a little birdy gave me a bigger list which can be shared.

This gives you an idea of what the entry-level, as well as well-oiled ConfigMgr administrators are looking at.

No surpise that PKI appears in the list, as people consider Native Mode for their existing or new implementations, nor that PXE for OS deployment, Installing ConfigMgr Sites servers and Client installation properties appear ...