When I prepare my experiments, I love to listen to podcasts or audiobooks. Mostly, the work is monotonous and/or boring so some entertainment is always welcome. Here's a list of my favorite science podcasts:

• This Week in Science (UC Davis) - The kickass science podcast
  The Naked Scientists (BBC) - Stripping down science
  National Science Foundation podcast - NSF in brief
  Nature podcast - From the journal Nature
  New Scientist podcast - from the journal New Scientist
  Science & the City - New York Academy of Sciences
  Science magazine podcast - from the journal Science
  Science Update - podcast from the AAAS
  Science Talk - from the journal Scientific American
  The Week from The Scientist - from the journal The Scientist
  Wanhoffs Wunderbare Welt der Wissenschaft - science podcast in German