Lizzy Shannon, the moderator, had a very nice casual style that put people at ease. (Had I actually come prepared, I might have stood up and given a pitch.)
Focus on character, not plot in the hook of your pitch.
Check out thrillfest.com: "What if, so what?" (I couldn’t find this.)
Why should someone (particularly the agent!) care about the protagonist?
Physical presence: hand gestures, eye contact, pauses
Recommended length: 25 words
Possibly end with a question–or leave a question in the agent’s mind that will cause them to ask the next question
Keep the followup to about a paragraph, but watch the reactions
What is the conflict?
Don’t be a formula. Be yourself.
Use active words like "flung"
Check out agentquery.com for additional hints.
Don’t "cold call" an agent or editor by just walking up to them. Make sure they’re receptive to listening.