"What is the burger flippin' rule? It's simple: my at-the-time soon-to-be husband and I would keep our lifestyle in check so that either, or both, of us could "flip burgers" for a living if that's what made us happy. We wouldn't be slaves to a job because of a big house, big car, or big [financial obligation du jour]... We didn't know it at the time, but this was the start of our journey towards frugality and financial independence."
Read more on this (kick-ass) rule here: FreetoPursue.com
------ [Photo cred: cloud2013]