* practice speech posture and accept feedback
* use extended definitions for content not familiar, and describe points of view by using more examples and analogies
* use visual effect to emphasize your speech: slides, projector, videos, handouts
* review visual effect to ensure coordination among the speaker, visual and the audience
* Slow the speaking speed and increase the volume to ensure under the existing site , facility and microphone conditions all the audiences can hear clearly.
* to pronunciate clearly, otherwise many listeners can hardly hear
* keep eyes contacting with the audiences
* use meaningful gestures: naturally without affectation; Make gestures to help emphasizing your point of view, rather than dispersing audience's attention.