Learning Non-Negotiables in Work / Life Balance

I'm learning from various folks how they protect their family time from the ever-encroaching demands of work and service.

Lately, the concept of "non-negotiables" comes into these conversations. Wise mentors, for example, refuse to travel more than once a month. It's a non-negotiable. Others protect family dinner as a non-negotiable. Still others insist that Friday evening is always family night--it's a non-negotiable.

Non-negotiable, if you remember, means not open for discussion or modification.

I'm learning more and more how different families use the non-negotiables to stay in balance in a world where work never ends.

If you have a moment, would you share your non-negotiables when it comes to work / life balance?