Firstly, continue to churn out unique quality content. That is ALL Google wants. You can NEVER go wrong with this.

Secondly, always diversify your SEO strategies. A little bit of blog comment backlinks, a little bit of profile backlinks, varying anchor text keyword backlinks, some article directory submissions, etc. Aim to be natural as top priority. Don't ever overdo ANYTHING, particualrly any of the SEO strategies.