Situation: 2 school aged children, DH works very full-time, me part-time. No grandparental help (live overseas). No cleaner.
Things we do / have that help:
Shared Google calendar for DH and I: if it ain't in the calendar, it doesn't happen! In really busy periods I print it out and put on the back of the front door so that everyone can see where they are meant to be at a certain time!
Small house: our 2 bed apartment can be cleaned from one end to the other in half a day.
Kondo-ing - it's so much easier to keep the place looking nice since we got rid of loads of stuff. Even the kids spontaneously Kondo their possessions / books / toys now!
Only choosing activities for children that are walking distance: buggered if I'm driving them all over the city or wrestling on the metro after school for a sports club! There are lots of options close to hand so we chose from them.
DH does as much as he can.
Things we should / could do differently:
Meal plan more consistently - I don't always manage to do it and do end up spending money/ time on last minute cooking.
Develop more routines - I'm a bit allergic to routines so housework etc tends to be ad hoc. It's hard to be consistent because DH works different hours each day, so some days he is around and others not.
Kondo some more! I know that we could simplify our house a bit more, it's a work in progress.
Sort out DH work / life balance: he's a teacher, so his work seeps out into every spare moment that he has, including evenings and weekends :-( He wants to do mre at home, especially since I'm working now, but it's so hard when he's got prep to do or a stack of 50 essays that need to be marked by Monday...