Googlers recommend the following to get better rankings in their search engine:

• Make pages primarily for users, not for search engines. Don't deceive your users or present different content to search engines than you display to users, which is commonly referred to as cloaking.
• Make a site with a clear hierarchy and text links. Every page should be reachable from at least one static text link.
• Create a useful, information-rich site, and write pages that clearly and accurately describe your content. Make sure that your elements and ALT attributes are descriptive and accurate.

• Keep the links on a given page to a reasonable number (fewer than 100).

Beginner's Guide to Search Engine Optimization