I've never finished one, but I have started several. (never about teaching. One is about an Alaska fishing job I had, and another about a particularly strange Korean train ride)
I've found meditation to help getting the creative juices flowing and standing on my head....as well as smoking slight amounts of hash or weed. Also writing poetry at lightning speed and singing.
I've read a few useful books on the subject but titles are failing me now. There are so many!!
Good luck to you...all the best.