The following is a list of resources that I have came across whilst studying for the VCP6-NV exam. This is mainly for my reference but hopefully it might help someone, I will update this list as I go

PDFs

NSX 6 Admin Guide

NSX 6 Install Guide

NSX-v Getting Started Guide

NSX-v Microsegment Getting Started Guide

Securing of NSX

NSX Network Virtualization Design Guide

NSX-v Reference Design Version 3.0

vSphere ESXi vCenter Server 6.0 Networking Guide

Blogs

http://blog.scottlowe.org/learning-nvp-nsx/

http://www.routetocloud.com/

http://lostdomain.org/vcix-nv-study-guide/

http://blog.bertello.org/category/vmware-nsx/