Know your craft well enough that mistakes teach instead of terrify.

A mistake inside a craft you know is information. You can see what went wrong, where it went wrong, and what to adjust, so the error becomes a lesson with a clear address. A mistake in an area you barely understand is just a shapeless failure, and shapeless failure is frightening because it seems to say something about you rather than about the work. The difference is not courage. It is knowing the terrain.

If a certain kind of error keeps scaring you, that fear is often a signal about a gap rather than a character flaw. Go learn the underlying mechanics of the thing you keep getting wrong, even the boring parts. Once you can name what happened, the same mistake stops feeling like a verdict.