Actually to optimize your blog or site there’s a lot of Free SEO Tools out there. Raven, have a great SEO Tools to check your page score. I always use that tools to check my blog or site. This tools will check your site Semantic Structure, Page Content, Obsolete & Deprecated HTML, and more.

And here’s this blog score from Raven SEO Analyzer Tools.

But, you should be aware about this score. Get the highest score doesn’t guarantee good positions on search engine result page (SERP). There’s another thing you should considers. Noel at searchengineherald.com write about Bad Content + Right SEO = Disaster.

Or if you want to learn about how to use Keyword Spinning techniques to optimize your blog, guys at bluehatseo.com write about it, read article about Keyword Spinning techniques here.

Oh BTW, if you want to check your blog score you can use free SEO analyzer