What do they mean by 'Get out of your head'?

The theme of Advertising Week 2010 is "Get out of your head." This is illustrated in a few different ways on the Advertising Week site. The main logo is a head with the top popped open—presumably allowing the brain to exit and attend panels and luncheons. Theodore Taylor III's big colorful illustration (cropped version above, full version after the jump) is also front and center on the site, showing a pretty freaked-out looking guy trapped in the light bulb of his own ideas.