Just because the interview is over doesn’t mean you don’t have more work to do. Make sure that you send your interviewer a thank you card or email. If you are sending an email, you should send it the day after the interview. This will help keep your name in front of your interviewer’s eyes without looking too aggressive. If you are sending a letter you should get it in the mail as soon as possible. The goal is to get your letter in front of the interviewer one or two days after the interview is completed. This should be done for every interviewer you have.