Four things, in your own words. We'll turn them into a one-page card you can glance at right before the call.
Who you're meeting, and for what. One line each.
The single example you'd most want to land. Three quick lines: situation, what you did, how it turned out.
The one you're hoping they won't ask. Naming it takes the sting out, and you can prepare for it like any other.
If they remember one thing about you, make it this. And one word for how you want to walk in.