Make sure you have good eye contact and that you are not playing with objects. Be Courteous, Tactful, Polite and Diplomatic Everyone appreciates people who are courteous, tactful, polite and diplomatic. The best way to learn these qualities is from others. Study someone that possesses the qualities you feel are admirable and learn how they behave in certain situations. If you don't have confidence in yourself others will not have confidence in you either.
People admire and respect confident people.
If you show others doubt, they will treat you with doubt. Be sure of yourself and play down your insecurities.