Just be sure to take some longer breaks so you go back to the drawing with fresh eyes. Go grab a piece of fruit or something, take a walk and then come back.
Trust me it DOES help to come back to something; sometimes even up to a week later you can see what you have to do.
As for new music, there's two good places I know that are totally legit and you've probably heard of them. Youtube and Pandora. If you don't know what Pandora is, it's free internet radio. The bands can be random, but the site usually sticks to a genre based on the band you initially search for. 40 hours of play time per month is the limit for people who don't have Pandora One. But, I'm sure between youtube and this, your music problems can be dealt with easier. Sorry I hope this isn't considered advertising; just tryin' to help!
Doctors heal you, Artists immortalize you.
"Those who can, do. Those who can't, teach" - bullshit.
The usual staples for anatomy: