I was going to do a primer myself on using a waveform and vectorscope, but I came across this tektronix sponsored post of the great author and colorist Steve Hullfish from the AlphaDogs Editor’s Lounge that did a great job.
tools
DV Rebel Tools
Seriously. Go get these. http://ae.tutsplus.com/articles/news/dv-rebel-tools-for-free/