Send a thank-you letter to the interviewer the next day to express your gratitude for being granted the interview. You may also emphasize your interests in the post/company again to demonstrate your enthusiasm.
Evaluate your preparation work. Write down the questions you are asked during the interview and your response to them. You may then discover some rooms for improvement.
Preparation Work before the Interview
Have I conducted sufficient research on the company/industry? Any brief notes made?
Have I forgotten to bring along the required documents or certificates?
Have I arrived the company on time?
Performance during the Interview
Am I satisfied with my performance? What were my strengths and weaknesses?
Were there any questions that were particularly tough to me?
How will I answer those difficult questions if I am given a second chance?
What impression have I made on the interviewers? Were they interested in my answers?
Did I grasp a chance to mention my merits, talents or relevant expertise?
Have I stayed calm and confident throughout the interview?
Did I master the use of body language?
Any comments from the interviewers?
Jot down some brief comments on the post, company and staff after the interview. They will be valuable reference when you are invited for a second interview or given the job offer.
Do not be dismayed by failure. Success often comes after many failed experiences. Every interview is a valuable moment to learn and experience. You can have better performance when you are invited for another interview.