Building a bigger audience

I would really love to hear from anyone out there on successful ways to build a bigger audience of people to hear the music, I am already on Reverbnation, LastFM, YouTube, MySpace, Facebook, Uplaya, and a couple of other ones.  I am not looking to spend money as of yet wiht regard to Itunes, CD Baby, Tunecore or things of that nature, but if you know of other sources for submitting music to sites to get new listeners would love to hear from you.  Drop me a line at tribalsoup01@gmail.com

thanks

Jesse