@BumbleBeeBoogie,
What are your experiences while you are speaking publicly?
Mostly good! I don't do as much of it anymore and I do miss it.
How do you prepare to speak?
Gosh depends. More scholarly stuff needs more prep.
Do you speak from notes or read from written text?
See above. Usually I just memorize the high points and then go from point to point. Sometimes I write down the high points if there are a lot of them. I've been known to use PowerPoint (I know it's evil but in signed presentations it makes things so much easier, I just look at the screen and keep going).
How do you overcome "stage fright?"
Usually don't have it to overcome, I have occasionally, usually when I have to speak-speak (instead of do it in ASL) and I worry about my voice quality/ volume. I speak pretty well but I'm terrible at projecting.
How do you relate to your audience?
The eye contact thing. Definitely adjust according to reactions. Build on funny stuff if it's getting a good response, go faster if people look bored with that part, ask questions/ get participation from audience, etc. etc.
How do you prepare to answer questions?
I don't usually prepare, usually it's something where I can answer questions off the top of my head.