Don't end the interview with just a handshake. Following up with a thank you letter is not only common courtesy but a true sign of closing the meeting professionally and courteously. A thank you letter is a professional hand-written letter or email sent within 24 hours of the interview. This is more important than you might think — when asked, most employers mention how much they like “thank you's“ and how it helps them remember the candidate. Review additional information and sample thank you letters on the SJSU Career Center web site.