If your time limitation let you do it, put your cover letter away for at least two or three day then pick it up again with a thought that you are the potential employer. Does it grip and hold your attention? Is it precise and comprehensive? Is it free of typing, misspellings, and grammatical mistakes? Is it appealing?
If you were the employer, did you realize what this job-seeker is willing to do and why he or she is the best person to do it? Would you call this job-seeker for an interview? And prior to mailing it off; check out our Cover Letter Do’s and Don’ts article given in the site.