The obvious and best reason for visiting some tables at tradeshows is for their free giveaways. You will find that many people will make the rounds to collect the free stuff. In some cases, the booths without free giveaways may experience lower traffic as a result. It's a cheap ploy, but the right giveaway can gain you exposure you wouldn't have had without it. Of course, you have to question the quality of your traffic if they're only coming over to steal another one of those great metal pens...

Tip: You can have fun with your giveaways. After all, if it's really good, it will likely end up in the hands of their kids.

~Idea submitted by kellyg.