Some ways you can get traffic to your hubs is to share the links to those hubs on Facebook, Twitter, Pinterest, and Google+ and ask others to share them too with people they know. Also make sure that your hub is featured and searchable on Google and other search engines. Try to incorporate keywords throughout your hubs so that when people search for something relevant to your hubs that your hubs will show up in the search results. You can also provide a link to some of your hubs in a hub you've written. Better if they will be related to the hub where you will be adding the links but that is not a necessity. Hope this helps.