You can create a search engine friendly website, by taking care of a few pointers. But, Creating a search engine friendly site does not necessarily mean that you will get top 10 listing for a particular keyword or keyword phrase. It is however a significant step if you want to rank anywhere near the first few pages of the search engine results. A site that is not search engine ready may not even appear in the results for any query.

Why my website is not ranking?

It depends on the keywords, backlinks, site age, site content and your competitors. The use of CSS alone does not help a site rank, but the cleanliness and ease of site navigation that helps. Search engines love good navigation, ease of use and readability for a visitor.

Focus on Quality Content
Put your energy and time to include quality content in your site. The content should drive people to come to your page day after day or week after week to see new updated content.

Avoid Flash and Videos
Flash in your site can really attract visitors but it is not spider-friendly. Robots will not index flash content site. Most search engine spiders are still unable to properly index Flash content. Search engine spiders are designed to read text and ignore images, so placing the majority of your sites content in a Flash file leaves most search engines without much content to read and use to determine your sites ranking.

Use CSS this make site more friendly.

Create Relevant Title Tags and descriptions

Validate HTML Code

Use Straight HTML Navigation Links on Your Website.

Remove Hidden Text and text with very small fonts.

Compliment your Java script attractive menus with a simple sitemap in your webpage or a simple menu somewhere at the bottom.

Use Sitemaps (HTML and XML sitemap ( XML is for search engine)
Sitemaps are pages containing text links to all the other pages on the site.