Most people use social media. They'll post their hub on their Facebook, Twitter, Pinterest, and LinkedIn accounts. "Here's my latest article on HubPages..." Depending on how many people in your network hit the "like" button or re-tweet it there a chance of increasing your traffic. Some people simply email the hub link to friends.
Another way to generate views is write about "hot topics", current events, or dating/relationship issues, gender differences...etc Some people research Google to see which words or phrases pop up first or the most times before they give a title to their hub. This way if people are looking for information on a particular topic there's a chance your article will show up within the first few pages. Best of luck!