This is so awesome that I couldn’t even save it for a links roundup post.
Justine Larbalestier has written a blog post debunking (in a way) the famous myth that one should only write what one knows. She urges us all to learn about things that interest us, and write about that! Books, she says, require research. And what brilliant advice that is! Check it out, much more well articulated than this summary, here.