Beck Institute for Cognitive Therapy and Research:
http://www.beckinstitute.org/

About.com Guide on Cognitive Therapy:
1. Anxiety & Depression

2. Insomnia

3. Medication vs. Psychotherapy

Cognitive Therapy and Research Journal:
http://www.sci.sdsu.edu/CAL/CTR/CTR.html

Cognitive Distortions:
http://ucsu.colorado.edu/~fredkin/cognitivelist.html

Dr Phil McGraw (my thoughts, and book reviews):
Philip C McGraw, Ph.D.