I just need a trade show display - right?

I apologize for the attached video as a shameless plug. The intent of my blog is to provide knowledge and facilitate conversation, not pitch. That said, it has merit. I was at a show today that had an overwhelming number of exhibitors with poorly designed booths. The booths clearly were not designed to assist the staff in communicating the value of doing business with them.

After coaching a client for about an hour on the floor, their booth neighbor approached me. He asked if I was the sales manager of the company. I explained what I was doing as a trade show strategist. His reply was that he had learned a lot from just watching and felt the approach was aggressive. I agreed. The trade show floor is not the place to be passive. Please understand that there is a difference between aggressive and obnoxious.
In a tough economy, shouldn't we really focus on how to aggressively market and sell?

What have you seen exhibitors do that you think helped increase their qualified leads, attracted people to their booth, communicated their message well or made them memorable?