I'm married, working minimum 50 hours a week (sometimes Saturday), but still set aside time for my wife, exercise and games. And other stuff in between. It's tough, and sometimes the old sleep requirements catch up with me and I just pass out early, but it's worth it. Actually family stuff is also a big component of it (wife has a big family and close relations), so I end up at a lot of birthdays, weddings, funerals etc. That's without even kids of my own, I reckon if and when I have a kid(s), priorities will change wildly.
But that's all it is, really. You can't overlook your priorities, especially basics like cleaning your house, eating properly, getting exercise, socializing (however you do it), working and SLEEP.