Opacity and Overlay Techniques

http://www.onextrapixel.com/2011/05/09/opacity-and-overlay-techniques-in-web-design/

Grunge Deisgn

http://www.onextrapixel.com/2011/05/11/grunge-in-design-examples-tutorials-and-resources/

Creative Call to Action Buttons

http://www.noupe.com/design/50-effective-and-creative-call-to-action-buttons.html

A comprehensive guide for amateur graphic designers and beginners

http://www.onextrapixel.com/2011/04/25/a-comprehensive-guide-for-amateur-graphic-designers-and-beginners/

Abstract Website Background Design

http://www.noupe.com/tutorial/50-useful-photoshop-tutorials-for-designing-abstract-backgrounds-2.html

Screenshots in Web Design

http://vandelaydesign.com/blog/galleries/screenshots-in-web-design/

Purple Web Design

http://designm.ag/inspiration/examples-of-purple-in-web-design/