One of the things that helps me, and many other artists, work is music. For some, it is background noise, for others, it is energizing and motivational. Personally, I find that music helps me think. I generally don't even 'hear' it after a while, but it's presence helps me focus.
Many of us use Pandora Radio, which is a free music site online. It allows users to create stations based on favorite artists--you select a favorite artist and Pandora will play their music along with musicians that have the same characteristics. Another wonderful aspect to Pandora is that it can be played on a variety of smartphones as well, so you can have music on the go! The unfortunate thing about it, is that it is restricted to use in the U.S. only. Hopefully they will work on going world wide.
You can find out more at Pandora.com...Enjoy!