Be yourself, and smile. (because when you leave, the manager will ask the employees working what they thought of you...remember a manager will not hire anyone who will disrupt the harmony of their current team, so if they did not like your first impression, you most likely will not get a call back).
Eye contact, smile, and have confidence (even with no experience)
Be a family member.
Help answer questions real people are asking about your company. Your answers will be 100% anonymous.
The person asking the question will be notified of your answer, and it will be posted publicly. Your identity will be kept private