I need the scoop on Articles and Blogs

I'm a newbie just starting out. I have a product up on a site, and now its time to market it. I've received a lot of advice telling me to submit articles and blog posts. I think I'm getting the gist of articles. I've started writing about 3 articles per day, and submitting them to EZA. When I write these articles, I make sure to include as many of the pertinent keywords as possible. I make sure to link back to my product page in the signature space.

Now, here are my questions. As I write these articles on ezinearticles, is it okay to just copy them and paste onto other article websites? What are some other "must-do's" when it comes to writing and submitting articles?

As far as blogs go, I'm sort of lost. Do I create my own blog, or write on someone else's blog? If its someone else's blog, how do I go about finding a good blog to post to? When I write a blog entry, should it be just like my articles, or should it be in a different format?

I really want to know if I can just write several articles per day, and then copy and paste them into as many article sites and blogs as possible.

If someone could give me some clarification on this whole article and blog thing, I'd be greatly appreciative.

Thanks,
T.R.