I think its very hard to advertise new tracks/album release etcs, mainly due to crappy myspace. Everyone with a pc and a microphone now records and everybody want everybody to hear their music. Its all got very saturated... when stuff like myspace started it was cool to hear new bands but now theres no point most of it aint worth listening to just down to sheer volume of artists out there.
I have a new album coming out and i am lost at how i am going to advertise it. I bought the unsigned book with loads of contacts etc. I am going to go back to mailing out albums than exclusively using the internet.