Those that seem to do it all....not those people on magazines or those that seem to do one thing extraordinarily better than anyone else on earth....but those people who take care of themselves, work full-time (if you don't, its hard for me to relate) and take care of their family. Those are the ones that just seem to balance everything well, and nobody is left wanting, especially their own mental health.
I feel like I'm much better at this since I've started to exercise regularly. Sure, I'm busier than hell! But, I feel like every moment of my time is valuable now....and its a great feeling.