One theme
The best speeches argue one thing. "Be ten percent braver." "The work is the reward." "Show up for each other." Decide your one theme before you write anything.
Open with a story, not a thank-you
The thank-yous bore audiences. Open with a 60-second story from your own life that sets up the theme.
Three sections, three minutes each
Section 1: the problem you're naming. Section 2: an example of the solution. Section 3: the call to action.
End on a single sentence
The line they'll remember. Practice it 50 times.