I don't do the punishingly long hours anymore. It wouldn't make me any more effective, nor successful, nor would it make me any happier.
My typical day.....I normally do about 30 mins of emails before the dcs are up, then 30 mins on way to work. I drop the dcs off twice a week to school, go to the gym twice a week and normally running late once a week
so rarely start work before 9.30am. I work through lunch and aim to finish at approx 6pm. I rarely do meetings after 5pm as that just means I will be late. I will literally walk out on people halfway through sentence since most of the time whatever people have to say at that time is not that urgent nor important. I go home (doing emails on the way home) see dcs, hear about their day, read stories, sing nursery rhymes and put them to bed. Anything urgent I walked out on, I deal with at 8pm, else I will check emails for about 30 mins at about 10pm. I don't work weekends.
Of course, sometimes I do a breakfast meeting, or dinner, and, probably about 6 weeks of the year (not consecutive) I might have a dreadful run of nights when I don't make it home for bedtime. I might also work maybe 1/2 weekends in the year. However, I also travel once a month for a few days at a time so it makes me much more precious about my time at home because I usually leave home on a Sunday and it interrupts our family weekend.
If i wanted to, I could stop work and go and pick up the dcs at 3pm and cook supper, take them to activities etc. That would be a giant waste of my time. As Laura said earlier the dcs are cranky. Leaving work early and acting as a taxi driver and Cook is not quality time with the dcs. That's grunt stuff, for which I pay my nanny handsomely. I do come home early to do pick up once a week which dd loves but she is cranky and tired about 10 minutes later. She normally perks up after I give her a snack and milk, at which point our nanny takes her off to ballet while I work from home. Best of both worlds!
I take 6 weeks of holidays a year. I need it! I am able to work as I do because I manage a large team but delegate everything except key decisions, meetings etc. I have also slimmed down my direct reports so that i am only working with experienced people who can think for themselves and don't need me to do it for them. Years ago, someone gave me some good advice - he said being a leader is about making a series of decisions and interventions. At the end of the day, I earn my crust as a leader for making the big decisions when it really counts and being there when it really counts. Those moments of time are far more important and valuable and recognising that means I am comfortable that my value isn't measurable in how many hours I crank out at my desk.