When I finished my masters I said i was never, ever, ever going back to school.
to make a long story short:
decided i wanted to study demography. i have a degree in sociology and loved every minute of it.
i believe in signs. i decided that if i could go through this process (applying, GRE, getting recommendations, etc) and get accepted, that field (demography) is where i'm supposed to be.
if i went through this and didn't get accepted, it would be a sign that i needed to stay on the track i was on.