There are a couple of excellent content on the blog just now looking at two issues relevant to any website looking to improve their search engine rankings:

Google’s Tips On Duplicate Content Worries looks at how Google views duplicate content.

Stop The Freak Out Over Linking looks at the dos and don’ts of using links to give your ranking a boost.

Anyone involved in working on their business’s website should keep up to date with search engine developments, and Search Engine Land is another great resource to add to your list.