Know your one sentence
Before you write a talk, write one sentence: the thing you want the audience to remember tomorrow morning. If you can't say it in one sentence, the audience won't be able to either.
This sentence isn't your title, and it isn't your topic. "Remote work" is a topic. "Teams that write things down work better remotely than teams that meet more" is a point. Everything in your talk should either support that sentence or be cut.
Write it on a card and keep it in front of you while you prepare. When you're unsure whether a story, a chart or a joke belongs, hold it up against the card. It makes most editing decisions for you.
Structure that carries you
A clear structure frees you from memorizing. If you know the shape of your talk, you can always find your way back, even when you lose your place.
A reliable shape for most talks is problem, insight, example, action. Name a problem the audience recognizes, share what you've learned, show it working in a real example, and end with one thing they can do.
Openings that earn attention
You have about thirty seconds to earn attention. Don't spend them thanking the organizers or introducing yourself at length.
Open with a question, a surprising number or the first line of a story. You can introduce yourself once the audience wants to know who you are.