You are worried about duplicate content on your web sites: here are the answers.
I've already indicated in a previous post how to look for keywords with Google tools but it's possible to use other tools.
You want to know what's your position on Google without going through all Google serach result page. And you want more tools for WordPress to manage traffic ?
I am not an SEO guru and you won't be one by the end of that post, but you might be able to improve your traffic.
Here are a few SEO techniques listed by other web sites (but it's all in French)