There are some great answers here!! As far as getting traffic, share your work on twitter, facebook and any other blog site that you can think of. There is no easy answer, it requires a lot of hard work.
Think of it like this; if you were to write a book how would you get people to buy it? Someone has to market it correct? So at HubPages you become your own marketer. Folks who write books just don't automatically get recognized it takes time. So you have to do a lot of self promotion to get people to read your work.
As far as what to write about here is a hub that may help you: http://hubpages.com/community/Help-What-should-I-w...
That is about the best answer I can give you, it's just going to take some time.