the first thing I would do would be to go to grad school.
after that, I'd get a job that was more rewarding intellectually, if not financially, and use investment interest on the remaining money to supliment for the reduced income.
I can't imagine not working, though... unless I had a stupid amount of money and could basically live my life in school pursuing multiple PhD's. hah. I'd love to have PhD's in English Lit, Sociology, and Biology