Remember the "you're a junior-level business student" now speech!  You are expected to write as a professional -- using complete sentences that flow logically from thought to thought.  Develop and follow an outline.  

For some helpful writing hints, check out The Elements of Style, an online style manual for writing.

Write for an alien.  

Assume that your reader has not read the materials upon which you are reporting.  Explain the issue to your reader as if she were an alien from outer space!  Don't assume that your reader has an understanding of business jargon or terminology or that he knows about the products of the company that you are addressing.