The simplest way to get a backlink as soon as possible is any webmaster forum's signature links. This step you have already passed, I guess, as I see couple of backlinks in your signature section. Next is I would say start creating accounts in all the social networking sites which are displayed in the addthis widget. After creating the accounts, just go ahead and bookmark all your articles till date. Dont forget to cross bookmark the articles so that you get some good results while going through this process.
Do given below following things: Article Submission Blog posting Comment posting relevant link exchange forum submission