Opinions expressed by Entrepreneur contributors are their own. Editor’s Note: The following article is excerpted from Kim Gordon’s latest book, Maximum Marketing, Minimum Dollars, (Kaplan Publishing).

A good sales letter is a crucial tool in promoting your electrical contracting business. Researching your competitors and the economic climate in your area can help you develop a marketing strategy ...

A form of direct mail in which an advertiser sends a letter to a potential customer Whether you send it out solo or as part of a direct-mail package, a sales letter can be one of your most effective ...