About the only radio I listen to is a saturday night 3-hour mix-up special; of course most of the music is unannounced so knowing the titles and artists is sometimes more difficult. But I buy a fair amount of new music by using the following methods:

* Following favourite artists and record labels. I find especially that some record labels consistently produce stuff that I like to hear. This I probably find is my main method of choosing new music.
* Buying compilations with artists I recognise.
* Listening to what other people are listening to.
* Looking through CDs at a store and taking them up to the listening booths.

That sort of covers it for me - I'd have a hard time exhausting those methods...

Have fun,

Paul