I almost didn’t jump in to answer your question because every answer I see here are great and I felt I couldn’t add anything extra that might help. Furthermore, I realize that anything I say is pure speculation anyway. Based on that I have to agree with Wesman Todd Shaw’s answer about speculation.
But then I thought about one thing I refrain from doing and I thought it might help to share that. And that is… I don’t try to do anything to artificially raise my score.
I feel that doing things like creating your own backlinks rather than letting them develop naturally, or following people just to get them to follow you back (not actually to read their Hubs), or stuffing keywords into your Hubs beyond those that naturally fall into the text as you write… all these things are artificial and they can actually backfire on you.
Other than that, just keep up the good work, do your best, and the rest will all fall into place.