Now, you're probably thinking I have lost my marbles since everyone knows that once the interview is over, the ball is in the hands of the company and there is nothing else we can do. There is something you can do. People like to be remembered and thanked for their time. You heard me right. It's more important than you think.
Nothing makes an impression quite like it.
In business it is called the follow-up letter. It is traditional to send one after any social event, and the tradition has recently been introduced and accepted into the business world. The thought processes involved are much longer than I have room to go into on this web page. Suffice it to say, a letter such as this is a strong token of your interest and can open many doors. Incidentally, e-mail won't work.