flaws and limitations, is a strong, accomplished person able to overcome any soluble problem set in their path. They tend to feel confident overall, have a broad life experience and set of skills, and not give up when the going gets tough. This style influenced not only the writing style of a generation of authors, but even their personal character. Harlan Ellison once said, "Very early in life when I read Robert Heinlein I got the thread that runs through his stories—the notion of the competent man ... I've always held that as my ideal. I've tried to be a very competent man." Rules of writing When fellow writers, or fans, wrote Heinlein asking for writing advice, he famously gave out his own list of rules for becoming a successful writer: You must write. Finish what you start. You must refrain from rewriting, except to editorial order. You must put your story on the market. You must keep it on the market until it has sold. About which he said: Heinlein later published an entire article, "On the Writing of Speculative Fiction", which included his rules, and from which the above quote is taken. When he says "anything said above them", he refers to his other guidelines. For example, he describes most stories as fitting into one of a handful of basic categories: The gadget story The human interest story Boy meets girl The Little Tailor The man-who-learned-better In the article, Heinlein proposes that most stories fit into the either the gadget story or the human interest story, which is itself subdivided into the three latter categories. He also credits L. Ron Hubbard as having identified "The Man-Who-Learned-Better". Influence among writers Heinlein has had a pervasive influence on other science fiction writers. In a 1953 poll of leading science fiction authors, he was cited more frequently as an influence than any other modern writer. Critic James Gifford writes that Heinlein gave Larry Niven and Jerry Pournelle extensive advice on a draft manuscript of The Mote in God's Eye. He contributed a cover blurb "Possibly the finest science fiction novel I have ever read." Writer David Gerrold, responsible for creating the tribbles in Star Trek, also credited Heinlein as the inspiration for his Dingilliad series of novels. Gregory Benford refers to his novel Jupiter Project as a Heinlein tribute. Similarly, Charles Stross says his Hugo Award-nominated novel Saturn's Children is "a