Aloud!

Currently, I am reading my book aloud.  All of it.   This audible experience has been the best editing method.  I have found several grammatical errors, spelling issues, and punctuation.   On the bigger picture, I have found issues with flow, strange sentence structures, and other weird problems.
  
I highly recommend this method.  I read about it in several books on writing and editing. I cannot emphasis enough how much this has helped me.  I wished I would have read it aloud sooner.