You can admire courage in a movie or practice it at lunch tomorrow. Only one changes your life.

Watching somebody brave is pleasant and costs nothing, which is why it is easy to mistake the feeling for the thing. The real version is small and unglamorous: sitting with the person nobody sits with, saying the unpopular thing, asking for what you want in front of people. None of it looks like a film, and it is the only kind that accumulates.

Pick one thing tomorrow at lunch, not next year. Something slightly uncomfortable and completely ordinary works best. The point is to find out that you can do it, because that evidence is what makes the next one easier.