I'll politely disagree with the person above me... Don't take the iPod. Practice the dying art of conversation. Tattoo artists have pretty good stories to tell.
So by now you have already gotten your work done (looks sweet btw), but I strongly disagree here, music, music and more music. I guess if you're gettin a 20 min flash piece, leave the ipod at home and chat it up, but most of my sessions have been 2 hours or more and anything to distract the mind is beneficial.
Getting tattooed HURTS!!!! So bring music, borrow an ipad, a couple magazines, a bottle of water in your bag, pretty much anything to pass the time.
My God, if you want to talk you can pause your music, but I need to distract my mind, otherwise it's torture.