13. Making life difficult for mobile users
Nowadays, everyone moves between multiple devices, like smart-phones, tablets, laptops, PCs or TV, to browse or purchase something via internet. As people are rapidly adopting multi-screen devices, it has become a must to make your website either fully responsive or mobile-friendly.
If you still haven’t adopted this trend, you have two options. First, you can use a Responsive WordPress theme that automatically adapts to whatever the screen size or device is. Second, you can make your site mobile-compatible by using a mobile plug-in like WPtouch or WPTap. The choice is yours!
Read more at http://www.jeffbullas.com/2014/04/14/the-15-most-common-wordpress-mistakes-to-avoid/#0bwir6fhJUfddPBR.99