I very much like Steve's idea of looking in the mirror in the morning and asking yourself "If this was the last day of my life, would I want to do what I am about to do today?" As I came to teaching after trying many other jobs, I suppose on most days the answer has to be "Yes". It is the one job I have had where I feel I have made a difference and touched hundreds, probably thousands, of lives. I have often thought that being a teacher is the best job in the world (certainly better than being an administrator!) which is why I have always ensured that no matter what I take on, I always teach for at least 50% of my time.
As Steve Jobs says:
Having survived pancreatic cancer and a liver transplant during this past year this movie, recorded 5 years ago now, is quite poignant. I wish Steve all the best for 2010.
Follow your heart and your intuition, they somehow already know what you truly want to become.