Many companies dump their products or brochures out on tables or even on the floor. This can overwhelm attendees, and make it more difficult for them to navigate your booth. A catalog is meant to show the entire product line, not a trade show booth.
Resist the urge to show everything your company can do and focus on the products that will speak the most to the attendees of the event. Display these products as actual exhibits. Place the products on pedestals or even in display cases. An open display case is another option – not having glass or acrylic around the product surface. This gives the impression of a museum display without restricting people from reaching out and touching the product.
-Chris Howard, Gyford StandOff Systems