I LOVE Pandora!  It's a free website where you can enter a favorite artist or song and its "music genome" will select additional songs that you'd enjoy.  It's constantly adding additional music.  It even will play classical music now!  I've learned about several musicians that I'd never encountered!  I was fortunate enough to come across some information about Pandora more than a year ago in a magazine.  I use it nearly every day.  It's a great way to learn more about music and broaden your musical horizons.

There are a few drawbacks to Pandora, however.  You are subjected to advertising...