But how do you know when it's time? While I advocate setting up a regular time for you to make time for yourself (to be by yourself or with friends).. there are those moments that sneak up on you with such craftiness that it takes every ounce of strength to make it to bed time.
For instance, a time when a GNO or MHD may be a matter of supreme urgency is when one, or all, of the examples (listed below) happen in regular succession:
A child sticks a pencil up their nose.
A child paints their face with.. wait for it... a BLUE SHARPIE.
You have cooked every meal for your kids and are only left with this:
Your two year old puts the coffee in the sugar bin. But alas, it was my fault.
You clean your house over and over again.. but at the end of the day it still looks like this:
I think you get the point. And I am sure you have many "exhibits" of your own. I just want to encourage you to know that "breaks" are okay to take. In fact, your family will be better for it. Even if your next day is filled with "exhibits" you will have a fresh perspective: like, it's doable without losing your sanity.