The Do’s and Don’ts in Thank You Letters

I’ve read too many to count cover and thank you letters. One of the things I look for is did the author include the name of the position and the company. Why? First and foremost, it demonstrates to the hiring manager that you’re not using a generated copy and paste letter that you’re handing out to everyone. Also, it reminds the hiring manager of who you were, what you talked about, and they can put a face with the name. Often times, when a hiring manager is interviewing a lot of people for a position, or several positions, it’s easy to lose track of who is who.

What then would be some “Do’s” and “Don’ts” in a thank you letter? Why?