Are You Most Creative When You're Tired or Distracted?

How many of us have trouble falling asleep some nights because of all of the ideas running through our heads?  And how many of those ideas are good, creative ones?  Do you get a brain flash while you're in the shower? A new article up at BPS Research Digest takes a stab at explaining why this is.  Do you have any tricks for when this happens?  I use the voice recorder on my phone when I'm in bed, but I'm still looking for a good solution for when I'm in the shower. I lose so many good ideas there...