At a glance I think you need to decide what it is you really want visitors to do, then... well... ask them!
It's as simple as that.
I see you have a "Create New Account" link, but you don't say what the visitor should create that account for, or what benefit there is to being a member. Plus the link is a little out of the way and not eye-catching.
Don't do anything yet though. First go to this section of Sitepoint; Reviews and Critiques .
Try to get your site reviewed in the "Website Reviews" forum.
Then come up with a plan based on the best of all the advice you will receive and rework your site from there.