You'll get better results with when you've mastered good cover letters and resume cover notes. These ten cover letter tips come from someone who reads cover notes every day.
Half the resume applications I receive have no cover note. No greeting, no introduction, no summary, nada. This is the worst mistake you can make, because for many resume reviewers, it's an immediate disqualification.
Always include a brief, friendly note that says why you’re sending your resume, and offers a tidbit about your background. If you don’t care enough about the job to take a minute to write a brief note of introduction with your resume, you’re wasting your time and theirs.