A cover letter is only helpful if it gets a hiring manager to look at your resume — and many hiring managers don’t bother to read them at all. Who can blame them? Most cover letters are a boring recap of a person’s resume or a form letter that doesn’t relate to the company or position.
Don’t bother writing a cover letter unless you have something new to say. Skip “Dear Sir/Madam” and take the extra time to find the name of the hiring manager.
Instead of repeating what is already in your resume, talk briefly and specifically about how your skills and experience relate to the job you are applying for.
Adapted from “The Best Cover Letter I Ever Received” by David Silverman.