Great idea! The day after the interview, you send the interviewer a letter with a photograph of an adorable little puppy enclosed. In your letter, you write the following: If I don’t get the job, I’ll kill this adorable little puppy.” Well, maybe that idiotic joke of an idea doesn’t apply, but a serious follow-up thank-you letter is appropriate after a job interview.
It can be a traditional snail-mail letter or an email note. Keep it short and simple, with no simpering or flowery promises. Thank the interviewer for the time and consideration he/she showed you during your visit. That’s enough, unless you want to add a sentence that if any more information, references and other papers from you are needed, you will send them promptly or bring them to the interviewer’s office.
There’s always the question of whether a follow-up phone call is preferable to the letter. Phone calls are often interruptions or annoying to the interviewer. You should send out the thank-you letter or email within 24 hours after the interview. A phone call is only necessary after five working days or more have passed since your interview date. At that time, you have the right to the courtesy of being told about the status of the job.
Whatever happens, keep cool and professional throughout the experience. If you do everything right, you just may nail that great job.