1. First, I would modify a little bit the theme, because many wordpress based article directories looks like yours.
2. I would add adsense to sidebars and inside the content.
3. Maybe a personalized logo would be a good plus.
4. The best would be to accept only unique articles (but this part is very hard taking in consideration that your site is new)
The rest is good, imo; and... optimize, advertise and monetize