With the emphasis so much oriented toward communication via technology, face-to-face first person skills can be overlooked. They ought to be practiced.
* Look at people. Don’t look over them, under them or around them.
* Engage people individually and collectively through eye contact. Rest on individuals and cover the audience.
* Make your eyes friendly, encouraging and inviting.
* Avoid flat or hostile eyes.
* Eyes are the most important parts of the anatomy when it comes to gesture.
* Compatible with the presenter and magnifying of speech.
* Gesture is a tool that can help emphasise and reinforce points.
* Overdoing gesture can undermine conversation because recipients are studying aspects of body language rather than listening to what is being said.
I recommend personal practive of these attributes and their encouragement by others.