Infographic inspiration: The State of Graphic Design 2012
John Jay’s lessons for young designers" or other people working through the creative process.
Awesome sacred geometry vector graphics for all you modern spiritual chicks
How To: Adobe Illustrator Geometric Art - Crafting For Holidays
Near the end of this link is the actual tutorial on how to create a long shadow for icons on illustrator. While this is basic stuff the use of long shadows are more common nowadays so this can be of some use.
Psychology of Color in Branding: Branding color emotions cheat-sheet guide
infographic: How Colors Influence People: The Psychology Of Color In Business Marketing. I love color and believe it does influence people.
Geometric Masks and Shapes Collection Modern Creative Design Bundle
A Comprehensive Guide to Symbolism, infographic designed by Zillion Designs.