Personalize your response as much as possible. A quick phone call can provide a name. In a blind ad, address your letter to a specific position title, and try to contact or write to the manager who will make the final hiring decision as well as the personnel representative named in the advertisements. There are several ways you can contact employers directly. Send a letter of application and your resume to the human resources department or to specific managers.
Many companies also accept applications online.
Your chances for success are greatly increased when you follow up with phone calls, which could lead to an invitation to visit the employer. When you send contact letters, try to request an appointment to discuss information you have read in the company's annual reports or trade literature. Let them know you would like to meet with them even if they have no positions currently available in their department. You may find it useful to state that you will be looking for a job in the near future, but for now you are just gathering information. Do not expect to be interviewed at this juncture.