Even though the interview is over, your work is far from complete...

After each interview mentally review the questions asked by the interviewer and your responses to them. Were you caught “off-guard” by any questions? Could you have answered a question better, in more detail, or in a more focused manner? Quiz yourself after each interview and take notes. This will enhance future interview efforts.
It is advisable to send a thank you letter to the person(s) who interviewed you within twenty-four hours after the interview. It reinforces your interest in the position and can serve as an additional opportunity to separate you from the other candidates by recalling a notable topic or attribute discussed in your interview.

Most employers will tell you when you can expect to hear from them. If you do not hear by that date, it is appropriate for you to call them.

If the employer requests additional materials, such as an application, transcript, or references, send them as soon as possible.

If an employer indicated an interest in pursuing things further with you, but you are no longer interested in the opportunity, inform him/her of that fact as soon as possible.

Here are some things you can do:

Type or handwrite the letter. E-mail is not as personal, therefore it should be used in conjunction with a personal letter. If you absolutely cannot write a letter, an e-mail is better than not following up at all.

The letter should be brief and include the following:

1. Thank the interviewer for his/her time.
2. State the position for which you are applying.
3. Mention something from your interview to remind the interviewer who you are.
4. Describe in one or two sentences why you are the best applicant.

Address it to the recruiter, by name and title

Mention the names of the people you met at the interview.

Send a letter to appropriate individuals you interviewed with (always send to the main interviewer).

Keep the letter short, less than one page.

Mail the letter within 24 hours of the interview.

Thank the interviewer for his/her time.

Send a thank you letter for every interview you go on.

Demonstrate employer knowledge in 2-3 sentences.

Restate employment objective.

Answer the question – “What can you do for them?” based on something specifically discussed during your contact. Use accomplishment/ results statements that demonstrate your ability to meet those needs.