A cover letter should be "businesslike, friendly and enthusiastic," said William S. Frank, founder of CareerLab in Denver and author of "200 Letters for Job Hunters." ...

Career Tips: Nowadays, many companies do not expect a cover letter from candidates. That is why professionals also do not pay much attention to it and submit their resumes in the interview without it.

Here are four tips Rosenheim suggests to make sure the cover letter helps win the job and doesn’t just end up tossed onto the “better luck next time” pile. 1. Don’t oversell.