Make sure your letter is error-free. If you are not a native speaker of English, make sure that your writing is not only correct, but also colloquial. Use a letter-quality printer and paper of the same quality as your resume. If you possibly can, address your correspondence to a specific individual and spell his or her name and title correctly. Often you can obtain this information by making a call to the employer.
Some advertisements make it almost impossible to obtain that information.
However, if you need to send very many letters to unknown entities, you almost certainly are not conducting your job search as effectively as you might. Before You Meet an Employer Several types of correspondence will form an employer's first impression of you. Cover letters to apply for employment when no position is advertised. Letters requesting brief informational meetings. In these letters, pay particular attention to writing a first paragraph which will motivate the recipient to continue reading.