Visit the Fallacy Files for a definition, history, examples, resources and quotes.  There is even a Fallacy Watch where people can submit examples of fallacies in reasoning.
http://www.fallacyfiles.org/quounquo.html

The Virtual Salt website provides an introduction to critical and creative thinking.  It has information on negative attitudes that block creativity, mental blocks to creativity and positive attitudes for creative thinking:
http://www.virtualsalt.com/crebook1.htm 

The Virtual Salt website also has creative thinking techniques including brainstorming, idea generating questions and block busting.
http://www.virtualsalt.com/crebook2.htm 

Visit the Creativity Web for resources on creativity and innovation:
Creativity Web

Visit the Creative Thinking Skills for Life and Education site for tools for teaching creativity.
http://www.asa3.org/ASA/education/think/creative.htm

Quotations for creative thinking:
http://creativequotations.com/