Use a who's who business list with flexible search options

For the most efficient search, use a directory that allows you to search in several ways, including by name, location or industry. This way, you can compile a list of the who's who of business that's relevant to your community or your field, or conduct research only on a specific person.

I recommend: Portfolio.com by Conde Nast includes the executive's title, a brief bio, a link to his or her company's website, and links to recent news articles about the person. The site features high-profile, nationally known executives, as well as executives from small and mid-sized businesses around the country.

Identify relationships between your company and top executives

It's important to understand not only what fellow executives do at their own companies, but also any connections they or their business may have to your own company. By identifying relationships already established between your circle and theirs, you can more quickly establish a rapport, and perhaps more easily get your foot in the door at a company you hope to do business with.

I recommend: The business who's who Boardroom Insiders maps points of connection between you or your company and C-level executives at other companies.

Try a who's who business list for free

For the most detailed information, a fee is usually required, but at many sites you can find names for free, or even try the subscription version on a trial basis. If you only need the names of who's who in business, or if you're using the database for a one-time project, a free or trial version may suffice. And you'll know if the site offers what you need before you invest resources in it.

I recommend: Hoover's free trial which gives you access to the full subscription version.