No eye-direction. It’s always good to show a user where to look and what is the most important element on the page. This can be achieved by using some sort of arrows or different colors for places where the call to action is displayed. User needs to know what we want from him the second he enters the page.

No consistency with the traffic source. A landing page should look like exactly what the user expects when he clicks the ad. For example, if the ad says “free download” then there has to be a download button on the landing page.

When visitors drop by your landing pages, what happens? If you’re making any of these deadly mistakes, they probably aren’t converting….