My advice to you would be:
Write more hubs. The more you write, the more people you will get coming to your hubs. If they are on similar topics, you will get people visiting more than one of your hubs. (I get 1.5 views for every 1 visitor)
Post about your hubs on Social media (I use Pinterest, Google+ and Facebook).
Good luck and hope your traffic improves to a level that you are happy with.