http://www.allgraphicdesign.com/graphicsblog/2007/11/the-coolest-business-cards-use-of-cool-shapes-textures-creativity-talent/
Part 1 - 6

http://www.logodesignlove.com/best-logo-design-resources
Food for thought.

http://weburbanist.com/2009/12/14/less-is-more-18-clever-logos-using-negative-space/
Negative space.

http://www.logodesignlove.com/10-handwritten-logo-designs
Successful naive design.

http://www.logodesignlove.com/logos-are-dead
Read this.

http://www.logodesignlove.com/vintage-logos
and if you don't care for the article.

http://wellmedicated.com/inspiration/50-amazing-gig-posters-sure-to-inspire/
50 band posters. Many of them retro.

http://www.reencoded.com/2009/08/10/50-beautiful-graphic-design-portfolios/
50 amazing designers.

http://webdesignledger.com/inspiration/50-inspiring-dark-web-designs
unconventional dark coloured webpages.
particular attention to number 1. The texture and layout are very nice.