There are many things you can do that will help you get traffic. All of the responses are right.
One of the biggest things is keyword research. But do not stop there.
You need to spread the word so to speak. I have written a couple of articles about this topic. They are short and informative but by no means are they the final word. There is much more to it than just that.
You can read this article about why you should tweet your hubs.
If you are unfamiliar with SEO'ing then you should also read this article as well.
I hope this is of some help to you.
Plus there is much more on this topic in the tutorial as well as from many experienced and successful HUbbers.