Cmykmag.com – advertisements from american students
Ihaveanidea.org – advice from advertising professionals

Creativity-online.com – the best new ads from around the world
Eschenck.typepad.com – great copywriter, lists many blogs
Edwardtufte.com – great designer
Improveverywhere.com – comedians doing crazy things
Theonion.com – fake newspaper to make you laugh
Sprinklebrigade.com – people decorate dog shit

Thenewyorktimes.com – thomas friedman, paul krugman

Ted.com – great minds share their thoughts and innovations