Communication Skills workshop from AGL was interesting. Even developing some basic awareness of how you come across does make a difference.
Some points to remember:
Keep a good posture (imagine a line between your head and the ceiling), breathe to keep a good pace.
More empathy! Use simple examples or shared experience to resonate with the audience.
Building up tension makes your speech more involving.
Asking a question helps tailor the message to the audience.
Finish the talk with a call to action.