OK. Let's do it: write unique content. Use the right language. Now about some On Page elements. The On Page elements are those, which refer to the html tags within the page. They may include Heading tags, Title tags, Bold Tags, Italic tags, Underline tags, etc. Let me show you here these examples:
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SEO You have to avoid the Black SEO and the Gray SEO, when you want to have a good On Page (onpage) SEO.
See more about it here:
http://www.discountclick.com/help/seo/on_page.asp