Proper Preparation Prevents Poor Performance.  Many candidates reduce their chances of an offer by not preparing for an interview and having clear concise answers to basic questions.   Listed below are a few tips to ensure that you are adequately prepared for your interview:

• Punctuality is crucial. If possible get an itinerary, the names and titles of people you will interview with.
• Educate yourself about the company. Get their web site, research critical information, such as annual sales revenue and primary lines of business and locations.
• Make a list of your accomplishments and give examples of how they may be an asset to your future employer.
• It is important that you interview the company by asking pertinent questions the job and what the interviewer is looking for in a candidate. Make a list of 10 basic questions that will help you identify what is expected in the job.
• Conservative attire is best. Greet your interviewer with a firm handshake and enthusiasm. 
• Sell yourself. Show confidence in your ability to do a good job. Use assumptive sales techniques.
• Ask for the job,  tell the hiring authority that you are interested and would like to pursue the opportunity further. Their response will be a good indication of their level of interest.