I may have mis understood the OP.
Our house and lives are organised. We rarely have last minute panics (and if we do they're caused by something out of our control like the school being shut with ZERO notice).
We have a lot of systems in place and a lot of routine.
But with 2 DC with ADHD our house isn't zen and calm. Its full of noise and movement (and fun ☺️). But it is easy to tidy and clean.
Meal plans reduce my thinking time.
Routines reduce thinking time.
A place for everything and everything in its place reduces a) questions about where things are and b) time consuming, panic inducing hunts for things.
Anticipating things reduces last minute panics. Parties are planned well ahead of time. Holidays are planned months in advance (including lists of what to take/things to do beforehand like booking cattery).
We go on a lot of days out but they're fun and go smoothly cos I know exactly what we need to take and I know exactly where everything is!
No clutter on the flat surfaces is calming.
Not having too many clothes is calming (its easier to tidy clean clothes away in drawers where there is space).
After years of sleep deprivation (see 2 ADHD DC!) I don't get up early to get things done before everyone gets up. Things just dont take that long cos Ive simplified systems as much as possible.
Both DC do over 5 hours of sports clubs per week each. But its set days (or competitions are planned in advance) and those days have their specific routine (eating earlier/not eating all together/eating quick and easy meals).