Content. Period.
Of course, this doesn't mean that you should start putting up content every 6 months, though.
Keep it balanced, but lean more to the content side.
This is because sooner, or later, quality content WOULD be the new SEO strategy, not quantity.
You can learn about it more at this thread.
http://www.v7n.com/forums/seo-forum/...ng-ground.html