1. After 2 or 3 days, send a thank you letter. This should be kept brief. Be sure to address the person who interviewed you and make references to any other in the interview. If you asked a probing question during the interview, include what you can do. Include any helping information. Do not use a generic format. Be professional.
2. If you do not hear anything after 2 weeks or when you were promised to hear something, politely inquire. Do this once a week until you are given an offer or told the position has been filled. Acceptable follow-ups include postal letters, e-mail, telephone, and personal visit. If visiting, an appointment is advised to show your respect for the other person's time and schedule.