Demonstrate to the employer your ability to write and communicate clearly.
Always include the name of any contacts who told you about the job. This may provide you with leverage or speed up the selection process.
Feature industry language to show your awareness of the company and field.
Should be kept in your records, electronically or in print for future reference.
Should be individualized to each job.
Should be printed on the same professional paper used for your resume.
Should be error free and grammatically correct.
Should be no more than one page with 3–4 paragraphs.