I shop therefore I am?

Adbusters (the satyrical counter-advertising mag) has created an event called Buy Nothing Day, which was in November last year in North America. But I think its an idea which should b carried forward, I mean, can you remember the last time you went a whole day without buying anything? (obviously excluding the days your hangover didn't permit you to get out of bed, i think the previous night's excess definitely discounts those days) It shouldn't be something that needs to be organized, nor should it be something difficult. I'm going to try it...