I get 70-80% of my traffic from Google and other search engines. I wrote about 6 hubs 3 years ago, and then stopped using hp for awhile. Several of these hubs do well in search engines now and I get double digit views daily for 3-4 of them. I have gone back and edited some of them, adding new information and optimizing for certain keywords and have seen traffic to these hubs double easily. My other hubs that I have written in the last 2-3 months are also starting to pick up a lot of search engine traffic.
So, I would strongly recommend writing hubs that will do well in search engines. Also consider going back and editing hubs that might not be doing well. There are plenty of resources here on hp that go into how to write evergreen hubs, but basically I try to write at least 1000 words, use Google Adwords Keyword tool to check for keywords and earning potential, check Google search results to see how competitive it is, and also use social media to promote/ provide backlinks to help get my hubs ranked high quickly.
it is also good to have nice formating in hubs, links to other hubs, and plenty of related pictures.
Hope this helps and gives you a few ideas!