Do you read the introduction?

I always skip the introduction when reading a book because I never know if it's going to paint my initial experience with the book. If I like it, I'll typically go back and read the introduction when I'm finished with the story. I try to go into most books fairly blind, but sometimes I think that this makes me miss things on the first read that I could otherwise have caught, but I can always come back to it at a later date. If there's something like a character list, maps or notes on chronology I'll typically consult those intermittently while reading. How do you guys appraoch introductions?