The content on your pages should contain the keywords that are relevant to that content, and should also contain the key word phrases that you think your target audience will use to find that information in a search.
With Blogging and Social Networking …link from other web sites back to your site with a link that has keywords and is within content that has relevant information about what info you are linking to.
Add new content and new pages to your site at least weekly.
Social networking weekly on sites like Face Book, Linked In, Twitter etc…