In my Wordcamp 2013 presentation entitled "Using Search Engine Optimization and Social Plugins," I covered several plugins needed for optimizing a Wordpress site, namely:
(1) All in One SEO
(2) Wordpress SEO By Yoast
(3) Google Analyticator
(4) Google Analytics for Wordpress
(5) Jetpack by Worpdress
(6) Google XML sitempa
I also discussed keyword research briefly as well as the importance of blogging.