Writing to get your webpage or blog post rated highly in search engines is a matter of knowing what words you want to write for and writing a good article that repeats the word or words frequently, with variety and naturally.  There are some other issues that might make it a bit tricky, but not once you get into the hang of it.

For example, you have to know what words people are searching for.  I promote a product called iLearning Global that I write about in a blog.  I needed to figure out how people were searching for the product before I started worrying about how to structure any given page.  See the article ilearningglobal for a detailed look at it.

Another article that will teach you a lot about SEO is How to Write a Review.  This article talks about how people search for the term XYZ Review all the time, and writing a review about your product (XYZ) is a great way to get good SEO results.

No, this is not everything, but these two articles will help you improve your SEO writing results a lot if you are not doing these things currently.