If you are an Origami beginners and wish to learn how to fold a paper model you can either buy/borrow any Origami books or use Origami Internet sites.
Here you can find some links to recommended Origami sites.
Asociacion Espaņola de Papiroflexia
British Origami Society
Dave's Origami Emporium by David Petty
The Best Origami site for traditional models, many great instructions and clear explanations.
NOA - Nippon Origami Association
Origami and Mental Health Therapy by George Ho.
The excellent and the most beneficial website, very useful and informative for everybody.
Joseph Wu's Origami Page
Origami for Everyone by Gerwin Sturm