In the experience section of your resume, the company says you can go back 10 years if the information you share contains relevant experience.  In fact, relevance is crucial to any resume and in the cover letter, the company urges you to "emphasize how you have added value to your previous positions."  The best way to do this is to quantify your impact using any numbers that show the impact you have had on your company or profits.  If you're applying for a job at Starbucks, it would be wise to show how you increased sales in your previous job or how you increased customer satisfaction, if you have figures to support that.