I don't know how they do it

I have been very busy lately. At least to my standards. Teaching, exams, meetings, application deadlines, babysitting, house guests, giving parties and going to parties, plus the usual taking-care-of-the-family things (cooking, laundry, hoovering, tidying, shopping) - so I've been very tired. And this starts me wondering how all those other people out there (who actually have really busy lives) manage. I read in the papers about people my age (and, yes, even in their THIRTIES) who have wildly successful careers (editors, lawyers, business managers, scientists, doctors) and who probably have 10-hour working days, but still have three or four kids, participate in politics or do voluntary work, coach their kid's football team, go to the gym three times a week, manage the upkeep of both their house, garden and cabin in the mountains, and of course take their kids on bracing all-day hikes in the mountains, with campfires and rappeling down cliffsides every Sunday.
Ok, I realise that they:
1) probably have a cleaner to do their house.
2) don't spend an hour or two in front of the telly in the evenings, watching Fawlty Towers or Spooks on dvd.
3) have developed unique efficiency in everything they do (everything I do has a tendency to fill all the time I have available, no matter if it is one or sixteen things).
4) never feel the need to do nothing at all.
5) are not innately lazy.

But still.
I'm not really busy, but still I have very very few open spaces in my schedule. I would like more time to stand and stare (or, to be perfectly honest, to laze around and do absolutely nothing for a few weeks):

What is this life if full of care
We have no time to stand and stare?
No time to stand beneath the boughs
And stare as long as sheep, or cows.
No time to see, when woods we pass,
Where squirrels hide their nuts in grass.
No time to see, in broad daylight,
Streams full of stars, like skies at night.
No time to turn at Beauty's glance,
And watch her feet, how they can dance.
No time to wait till her mouth can
Enrich that smile her eyes began.
A poor life this, if full of care,
We have no time to stand and stare.

William Henry Davies 1871 - 1940