What would be a good way to promote music?

What would be a good way to promote music, online? I don’t have the ability to play out, so I use Myspace and other sites, Ourstage recently. However, it still appears that I am having a hard time getting the music out. Any suggestions, because as we all know, the market (Internet) is saturated with these types of DIYs. When I say DIY, I mean electronic. trust me, I know the true, original DIY aesthetic is hard work and very time consuming.