I came upon an interesting blog post, via a link via another link. It started at Journalista and made its way to Austin Kleon's site and his blog post, Rilke's Letters To A Young Poet. A well known book, its the source of that old piece of advice, 'Write what you know!' But what does that mean, exactly?
Click on the link and find out! And read the comments too. (No, I am not the David who commented.)