be carefull with "fast". try get natural link from good PR site. I read that natural link means people write an article mentioning your website, but Google not know you own the website but you write article on other website about yours also.. keep working and congrats for your PR 2 ..
Congratulation buddy...You got the page rank for your website. I am also implementing unique content in regular way and create quality back links through guest blogging in a regular way and also involve in SMO (Social Media Optimization) after Google Panda and Penguin Update.
congrats. I think your first task should be to keep your site atleast on page rank 2 in google's next update. Secondly try to get more traffic from social sites especially form twitter and facebook.
Good keep it up ! As you have done for 2nd in same way try to achieve ! there is no such a magic to do ! it's depend on Algorithms base !