Well-thought-out trade-show giveaways do work. Irrelevant, unimaginative freebies do not. And beware of catering to giveaway grabbers who will dart into your booth, grab a freebie and dart back to the aisle without so much as making eye contact with your staff. Give out freebies to booth visitors
Effective giveaways provoke questions and give visitors a reason to pause long enough to learn something about your company. It's also a good idea to develop a theme for your booth and integrate the giveaway into the theme. You don't have to spend a lot of money to devise a great giveaway.