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I'm using the Raven Tools app for iPad... although admittedly, you can get an almost identical experience by visiting the website in Safari.

SEO by yoast, as mentioned, has all the features of many paid plugins from 2010, plus more. Also, use W3 Total Cache, and be sure to minimize your CSS/JS. This will significantly reduce page load + headspace. Be sure to WWW canonical fix as well, which can be done via htaccess or a plugin if you're code adverse. Directory submissions are fine, but they are low value. In-context links and video should be your primary focus.