Constant planning.
We have a live in nanny so Mon to Fri don't have to worry about getting kids ready for school. She cooks for everyone 4 days and I do the other 3 days. I menu plan a week/two ahead. Grocery shop on line with Sainsburys and have the same slot, reserved 3 weeks ahead. I just go through the usuals list and add in the norm then finalise the night before.
On line shop for almost everything - usually John Lewis and Amazon as between them you're covered!
I use the organised mum weekly calendar which has 6 columns - first 3 for daily whereabouts of dh and I, dc1 and dc2 and last 3 for menu. Also note on there who needs paying that week.
I pack bag the night before and clothes out as well. I exercise 3/4 times a week so also leave gym gear out the night before.
We outsource as many chores as possible (alhough they all need organising, managing and paying!) - cleaner comes twice a week, ironing once a week (I do all the laundry at weekend in anticipation), dry cleaners do a weekly pick up and drop off at our house, gardener fortnightly, window cleaner and bin cleaner monthly.
I also started taking a half day off a month just to sort myself out - sort out the to do list, birthday cards/presents, make appointments, book nights out etc. This has really helped in making me feel in control.