What are the professional development hallmarks of a digital marketing career? Trade shows and conferences are like the Energizer Bunnies of the digital marketing industry. Despite hard times, demand for events has grown. I think I've figured out why. But first let's walk through what it's like to kick off a digital marketing career these days. Someone launching, say, a search marketing career will encounter information overload. Of course, overload's not as bad as ignorance. Narrow specialists...