SPI : INCREASE LINK POPULARITY

I have setup another 2 blog regarding my online dealing few months ago, I'm very much interested to know how to increase link popularity.

I'm know nothing about those link popularity score or page rank for..When I'm search my blog in google and yahoo..the result was just few hundred link..which I think was a bad result..I can't earn any from tat kind of popularity..I gotta learn more about this..

Sad to say, the only way I know was visiting others blog ..leave some comment and trying to attract them to my blog..I do read from somewhere, the best way to increase link popularity is thru blog...maybe I have to visit others blog often and leave comment, so tat it could bring up my blog link popularity..