Something you cannot afford to miss on your (virtual) bookshelf is the recently released Microsoft Ebook titled Configuration Manager Field Experience.
The book is divided into three main topics.
Part 1: WMI for System Center 2012 Configuration Manager administrators is designed to familiarize you with basic WMI concepts and tools, show you how to use WMI classes to create Configuration Manager queries, and help you understand the underlying database design of Configuration Manager so you can create custom reports for querying the information you need.
Part 2: System Center 2012 Configuration Manager reporting is designed to familiarize you with SSRS and show you how to integrate SSRS with Configuration Manager 2012 and to customize and create new reports using SSRS.
Part 3: Configuration Manager deployment tips provides tips that cover a wide variety of different scenarios to help you ensure the success of your deployments.
The ebook is free and available for download here: Microsoft System Center- Configuration Manager Field Experience
