I have no experience at all about changing careers/jobs. but here's my two cents: Would you consider going back to school? I have a lot of adult students in my classes who went back to school for a better, more enjoyable job. Just a thought. I've always been told to get a job I look forward to, I know with the economy and limited space that not always possible, doesn't hurt to try a new area. "The more you learn the more you earn"