google analyze: 那些网页和链接需要修改？
优化 wordpress 的十个方法.
http://wp.tutsplus.com/tutorials/10-quick-tips-optimizing-speeding-up-your-wordpress-site/
测试网页速度的工具:
http://www.webpagetest.org
参照：
http://www.possiblelab.com/2013/11/16/optimize-our-website-part-1/
http://www.possiblelab.com/2013/11/19/optimize-our-website-part-2/