11th point to me would be too look at your social media properties, work out how you can use them to assist your SEO strategy. I mean working on competitions via social channels to drive SEO benefit to your main site is great, working on re-doing your YouTube videos to assist the main site and also working on your content sharing strategy via these social sites back to the main site.
Having large groups of content that all revolve around the same topic will build more relevance around keywords that you're trying to rank for within these topics, and it makes it much easier for Google to associate your content with specific topics. Not only that, but it makes it much easier to interlink between your content, pushing more internal links through your website.
Although it may have changed slightly since BrightEdge published its report last year, the data still seem to hold true. Organic is simply better for delivering relevant traffic. The only channel that performs better in some capacities is paid search ads, but that is only for conversions, not overall traffic delivery (Paid Search only accounted for 10 percent of overall total traffic).