However, critical mistakes in your marketing campaign can have the opposite effect. Here are five costly errors that are common in our business, along with some sound advice on how to avoid making them.

For example, suppose the exhibition space is too small for the crowd you'll attract. With thousands of people pushing and shoving each other to find the exhibits, your show will quickly get a bad reputation as an uncomfortable event where it's impossible to see all the products. And negative word of mouth travels almost as fast as the speed of light.

The solution: Do your homework! Get the inside scoop from other trade show managers who have done shows at that exhibition hall. Find out what was positive about their experiences. Conduct an on-site inspection before committing to the exhibition space, paying close attention to such factors as exhibit hall space, bathroom facilities, and air circulation.

Consider location (is it in a dangerous part of town?), accessibility (are there traffic problems?), and service (are ticket counters adequately staffed?). Better yet, do your inspection while a trade show is going on at the exhibition hall. You'll get to see for yourself whether shows operate efficiently there.

2. You compile an ineffective prospect database.
You might be trying to cut corners by doing your data management in-house, but if you don't have database pros on staff, it's best to seek professional help!

A list that has unlikely prospects or out-of-date addresses is a waste of time and money, and you'll lose precious opportunities to zero in on hot potential customers. You might hesitate to spend more money on a solid database management firm, but you could lose twice as much by failing to reach the right target audience.

3. You construct a poorly designed Web site.

You'll feel like a relic left over from the pre-Electronic Revolution days if you don't have a Web site. However, many trade show managers, in a rush to construct and display a Web site, wind up with sites that lack compelling graphics or information that will be useful to their potential exhibitors.

Without proper guidance you'll waste money ... and project an image of a business that isn't ready for this millennium.

The solution: Find a reliable Web site designer who is familiar with the trade show business and will hire writers who can create Web site copy that is powerful, persuasive, and informative.

But don't put a site up until you're ready; you wouldn't want your Web site debut to fall flat.

4. You have a great Web site, but nobody sees it.

Those who aren't Internet savvy sometimes think that once they create a Web site, their prospects will automatically find it -- after all, that's what Web search engines are for, right? Wrong!

Search engines are great if someone wants general information about trade shows, but there's no guarantee your show will be at the top of the "hit list." Because there are millions of Web sites on the Internet, the only sure way to differentiate your site from the rest and drive traffic to it is through collateral advertising.,p> Make sure your Web site address is prominently displayed on all your advertising and marketing materials, including your stationery and business cards. An expensive, snazzy Web site is useless if no one visits it.

5. You put together an ineffective ad campaign.

Bad advertising is worse than no advertising at all. Unless you have a great in-house advertising department, resist the temptation to create your own ad campaign.

Advertising is not a good place to start a budget-cutting initiative. But just because you hire pros to do your advertising doesn't mean you'll have an effective campaign. It's best to find an ad agency that has had consistent success in the trade show industry.

To find such an agency, do your research. Consult with other trade show managers and look through the Advertising Redbook, available in the reference section at most public libraries.

Ask for examples of an ad agency's work with other trade shows. Steer clear of campaigns that might be a turn-off to your prospects by appealing to a specific generation rather than a wider audience.

And remember that humor and creativity are important attention-getting devices in advertising, but don't let your message get lost.