Recruiting expert Brad Karsh offers résumé dos and don'ts for those just entering the field.

Erica Iacono: What are some of most common résumé on outstanding leadership and accomplishments.” and cover-letter mistakes you see from new job-seekers?

Brad Karsh: Ninety-nine out of 100 people write a job description résumé. Most will say, “Wrote press release promoting [so and so].” I might argue that any person seeking a job at a PR firm has written a press release.

Recruiting directors want specific accomplishments. ...