It's good to be proactive on this. I am in the Recruitment industry and can speak pretty well to this. First, I would always tailor your resume` to highlight your skills relative to the job you are applying for. Making your background as relative as possible is a great first indicator. Second, hiring managers like to see actual accomplishments you've had for each role. For example, if you led in sales a month, brought in x amount of dollars for the company, achieved project goals, etc. then highlight that for each job you have had. Third, make sure the resume` is consistently formatted. Sloppy resume`s show little attention to detail and can turn an HM off. You can find good templates online for this. Finally, make sure your resume` isn't too long. Try to keep it to a couple of pages, maybe three.