Beginning To Color

Someday there will be a person needing to make a commercial for their local cinema, who used a nice camera and while editing everything realizes that the lights in the mall required some color tools...and knowledge. 

Here's a nice place to start:

Magic Bullet Colorista II Tutorials by Stu Maschwitz on Vimeo

with some free tools:

Prolost - Blog - Two Free Color Correction Plug-ins from Red Giant Software