State your objective. Try to specifically gear your objective to the writing position or the writing job posting that you are applying for.
List your most-recent writing job experience that is relevant to the writing position you are applying for. Also list your last ten years of employment if you have worked for ten years.
Be accurate. Make sure your start-dates and end-dates are accurate for all of your writing jobs and other job experience.
Include your key accomplishments from all of your previous jobs that will demonstrate how qualified you are for the position you are applying for.
Include any pertinent information with regard to your writing talent and accomplishments that will highlight how you added value in your most recent last role.
List your complete education, beginning with your your most recent education. Make sure to include all relevant writing or publishing courses, writing classes, seminars and writer's workshops that you have taken and completed that are specifically relevant to the writing position you are applying for.
Make sure that you always include your current contact information, so that you can be easily reached.
Do not include additional personal information unless specifically asked for it.
Be concise. Generally, a one-page resume is sufficient, two pages at most.