1) Edit meta descriptions & keyword tags and page titles in page settings

2) Create useful, human readable page urls that include relevant keywords - in page settings.

3) Assign each image with alt text (keywords) by giving them a title in image settings

4) Use plenty of Keyword rich Indexable Content.  Indexable content refers only to text content on the site, including links. (Video content indexing is improving also). (NOTE - flash and images ARE NOT themselves indexable content, although their presence can count towards the way pages are indexed).

5) Siloing is the practice of creating links within your site from high ranking pages to lower ranking pages.

6) Include third party tracking scripts from Google analytics others, in page settings.

7) Off Site / Inbound links: The links from other sites including search engines bring traffic to the site both directly and indirectly, (indirectly by increasing the visibility of the site in search engine results and therefor increasing traffic).

An ESSENTIAL ingredient relevant to all of these aspects of SEO is