Do not send just one letter but mail copies to several people within the organization to cover all of the possible avenues. This list should include the president, vice-president, personnel director, a recruiter, or the individual who would be your direct supervisor. This approach would minimize your chances of having your letter going straight into the trash. After approximately a week to ten days, follow up your letter with a phone call. Speak directly to the person to whom you addressed the letter, if possible, to make sure they received your resume and investigate the possibility of scheduling an interview.
Sincere enthusiasm does pay off.
Always follow-up by letter or telephone any business contacts you have made. No matter how good things look, you must continue to job search. You have to always maintain activity with those companies with whom you are in consideration with. But do not forget about your marketing schedule. Even if an offer is pending, you must keep working towards achieving your goal.