Adobe+Illustrator+Tips

Bezier Curves
http://en.wikipedia.org/wiki/B%C3%A9zier_curve

Veerle Pieter's 4 Simple Shapes in Illustrator
http://veerle-v2.duoh.com/blog/comments/4_simple_shapes_in_illustrator/

Performing with the Pen
http://etutorials.org/Adobe/Adobe+Illustrator+CS/Part+II+Drawing+and+Coloring+Your+Artwork/Chapter+7+Wielding+the+Mighty+Pen+Tool/Performing+with+the+Pen+the+Path+and+the+Anchor+Points/

Difference between Corner and Smooth Anchor Points
http://forums.adobe.com/message/4727232

llustrator Symbols
http://help.adobe.com/en_US/illustrator/cs/using/WS714a382cdf7d304e7e07d0100196cbc5f-6221a.html