I now can be sure that, once I start writing a book, I'll be able to finish it. I've also become more assured about my 'voice' as a writer and being able to keep the characters true to themselves.
Because I believe actually the more you do something, the less frightening it becomes because you start to realize the outcome is not as important as you think.
In 1979, Alien came out and Sigourney was in it with a bunch a guys. Nobody at that time expected the woman to be the hero, so that was a tradition that started.