Is there another book in me?

I'm not sure. I search my mind for topics of interest and storylines, but there seems to be a void. Truth be told I would be estatic with even just one multi-billion dollar best seller, but it would be nice to have a string of successes. How do these professsional writers do it? A writer once told me she takes inspiration from her dreams, but she's a romance writer. I don't think a dream of me re-living the nasty conversation I had with a customer service rep would make a good book. I need inspiration, helpppp!