Do you need free of Organic traffic which converts something similar as PPC paid traffic like Adwords, YPN ? I guess you will take interest in it, because after spent lots of $$$ on adword, ypn, media company ppc, I feel that organic traffic is only reliable, and the good thing about it, is that you will get unlimited quantity of free traffic is Free.
I am not mean that Adword, YPN or other marketing ways are useless, but there is difference of your investment risk, I feel ppc is only for them you can take these business risk very lightly.
But organic traffic will only cost you your efforts, hardwork & your ability to attract as much traffic is possible. And the good thing is that you will get the result of your efforts for lifetime, there is nothing will get waste if you are very dedicated with your efforts.