The most important thing that you can do is to improve your website.
In your topic area or industry what is the most valuable content that you could produce that would be appreciated by your target audience? If you can identify that and produce best-on-the-web information that is helpful and useful and easy-to-understand then that is the best thing that you can do.
Best-On-The-Web
This type of content is liked, tweeted, linked to, emailed, bookmarked and shared. That type of activity will bring more people to your site who will like, tweet, email, link, bookmark and share. This activity can improve your rankings and also improve your metrics.
You can hasten that process by promoting your content so that a larger number of people see it - especially to the people in your topic area or industry who have a voice or who are active in reporting and sharing.
The SEOmoz metrics are a good way to get a numerical gauge of your progress over time. They can also be used as a way to compare the relative mojo of your site against others.
So, instead of looking to them to light the way to success, you should instead be making a big "to do list" of jobs that will improve your site, getting them done and helping other people discover what you have created.
One of the greatest problems that people have in doing this is that they produce yada yada yada content instead of best-on-the-web in their niche. So if your content is not making people say WOW! then it is time to kick up the quality.
Pedestrian content does not get shared. You need WOW! content for that to happen. Even if your site is about something as mundane as manure it is still possible to create content that will attract attention and be shared.