Email marketing 777

I’m writing a refutation paper in which i’m refuting an essay. The essay says that 499 people say this and that but i’m saying that 499 people for a survey is not enough nor credible. And my writing teacher agreed. But i wanna find a more credible source that says that 499 is no enough for something about a what a credible survey looks like? Thank u all

I was told the following: I have to be:

- an expert on the subject.
- I should know 10 words for every word I write.
For example If I write on success, I should already be successful. If I write on money, I should already be rich. If I write on relationships, I should already be happily married.

Granted and I accept that, otherwise what is the point of the book?

I would like to hear from people who have succesfully written non-fiction or fiction. Although my topic is going to be non-fiction I would like know how you went about it? How can I use the Internet to assist me in doing so? For example, having a blog, a website, email and so forth. And what about marketing the final publication on the Internet? This looks like a daunting task on its own. I look forward to your comments.
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