I checked your site. Design, navigation is good but the content is not so unique.
you have to give more attention to low competitive keywords. Try some different article. And try to increase subscribers.
I found you use right side bar sticky widgets to show ad but try it with a subscription gadget.
The best way to earn is to getting subscription list.
when you build a 10k subscribers list you will automatically earn good amount of traffic
don’t show too many ads you must give the highest priority to the user experience.