Right now I am reading "Forgotten God" by Francis Chan. I read something tonight that made me think:
It used to be that if I had a great worship experience, I asked God to duplicate it the next time I came to worship. Like the kid impressed by a silly magic trick, I would pray, "Do it again!" One thing I have learned about God over the years, however, is that He rarely "does it again." He's the Creator, which means that He is (among other things) creative.