These links are the industries best places to find content and answers to your most difficult queries and problems:
www.taoofcolor.com/ - subscribe to the Tao weekly newsletter for interesting tidbits, news items and links related to the art, craft and business of professional color grading
www.cinematography.net/ - Mailing list for professional cinematographers and their crews and supliers
www.colorist.org/ - TIG Telecine Internet Group, a mailing list and web presence for professionals involved in color grading, telecine and digital intermediate processes
www.creativecow.net/ - Support Communities for digital video, video editing and media professionals in broadcasting, motion graphics and special effects
www.colorgadingcentral.com/ - A learning resource to help improve your color grading skills. Lots of free video tutorials