Great post Anita!
I'll add one thing, which you touched on slightly in theme:
Don't pre-apologize for how the talk is going to go or over-humblize yourself at the start. They're here to see you. Saying sorry, or letting the audience you just put the slides together last night is letting the air out of the room. If you're happy and excited to talk, the room will love the talk no matter what.
Absolutely, that is a great point!! It can also come across as bragging even if it is not the speaker's intention.
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