This means everyone from the reception staff to the interviewer. You never know who has input in the hiring process, and you can only make a first impression once.

Body language is also critical. Be sure you follow these tips:

• Look everyone in the eye and smile. Looking people in the eye will telegraph alertness, and smiling will signal friendliness.
• Speak clearly and say "please" and "thank you." Make sure the people you talk to during the interview can make out what you're saying.
• Talking audibly, with good enunciation, tells people you're confident, while good manners tells them you're considerate of other people.
• Don't cross your arms or slouch.
• Give firm handshakes and smile.