There's a wealth of education about the National Traffic System (NTS) on the web. However, I had to do a little bit of searching here and there. This is a working list of references that I've found helpful in my NTS studies:
ARRL Table of Contents
Quick and Dirty CW Netiquette by Alan Wormser, N5LF
NTS Talk Revitalizing the National Traffic System
Send along links that you have found helpful.