Not using Google Analytics
Would you like to drive a car that doesn’t have headlights? Absolutely not! Then why would you run your blog without using an analytics program like Google Analytics. As WordPress dashboard is not enough to get detailed insights about your site, you should use one of the best web analytics services: Google Analytics.
Google Analytics offers you a wide range of free services that you can use to monitor your website traffic, keep track of visitor’s behavior on your site and know about the keywords that can generate more traffic to your site. Apart from this, we also recommend you to sign-up with Google Webmaster Tools to keep track of your website health.
Read more at http://www.jeffbullas.com/2014/04/14/the-15-most-common-wordpress-mistakes-to-avoid/#0bwir6fhJUfddPBR.99