I do a lot of public speaking and presentations and I'll always start with a self-deprecating joke to make everybody feel comfortable with my size because there can be hang-ups and anxieties.

Some introverts are perfectly comfortable with public speaking; I'm not one of them.

Blacksmiths sometimes twist a rope tight around the nose of a horse, and by thus inflicting a little pain they distract his attention from the shoeing process. One way to get air out of a
glass is to pour in water. Be Absorbed by Your Subject

When speaking, be clear, be brief and be memorable.

If there's anything a public servant hates to do it's something for the public.

The stroke of the whip maketh marks in the flesh: but the stroke of the tongue breaketh the bones. Many have fallen by the edge of the sword: but not so many as have fallen by the tongue. [Ecclesiasticus 28:17 --18].