Not all the time do I get to set up the drawing ambiance- sometimes for me, I draw/ink/color/letter at my day gig during the quiet lulls that I sometimes have. Other times, I'm at home where I can shut my bedroom door, slap on my headphones and listen to music while drawing/inking/coloring/lettering(sometimes I'll turn on the TV/Netflix as background noise).
On the weekends that I do get to set up, I just grab a bottled water, something to snack on, either listen to music or Pandora, and get to drawing.