Jen Wells, an equity partner in Team Builder Search, says a good cover letter will not help or harm your chances of landing an interview. A great cover letter will because most if not all employers want to hire people who can write.
While these 10 suggestions focus on writing a paper for a college course, the suggesions are applicapble to a business paper.
Also, while these 10 tips center on law school papers, they remain useful for business writing. Related to these documents, these writing tips cover a variety of business writing topics.
Tim Phillips gives several ways to improve clarity including cutting out jargon, which John Smurf helpfully reviews hundreds of business-related jargon words and phrases.