Work, bring home a paycheck, and discipline when necessary.
For years that was the role of fathers. Dads were breadwinners who put in long hours so they could bring home the bacon, which mothers then cooked for breakfast the next morning. Usually dads were gone before sunrise and home around dinner, just in time to follow through on mom's threats to the kids of "WAIT UNTIL YOUR FATHER GETS HOME!" Times were different then, with many dads from years ago never even changing diapers, so the notion of a full-time stay-at-home dad was completely foreign.
But the Don Drapers of the world have faded away as more women than men graduate from college, and the vast majority of those who lost jobs in the recent economic recession were men. Throw in the fact that modern day dads are actively striving for “shared parenting” and increased involvement with their kids, and you have a fundamental shift underway regarding work/life balance as it pertains to men.