@PhannyMcNee I had to check I hadn't posted on here and forgotten about it when I read your post!
We are also six.
Colourcode socks and pants - different heels/toes for people who require 1 colour socks for school.
Colourcode towels and flannels, or put band logos/ sports team logos on them if colours are the same colours. 2 per child, washed the same day as bedding for each child.
A long time ago we colour-coded name tapes (DC1 red names, 2 blue, 3 green, 4 black) and carried it through to sports bags, swimming bags, stickers for school stuff etc. It meant you could just look at the colour which I found quicker than reading the name.
Pre-sort washing - we have a whites/lights basket, a dark basket and a red basket. If it's not in the basket it doesn't get washed (yes, DS2, I am looking at you).
Laundry - Each person (incl. DH!) has a day on which they are responsible for washing what's in baskets and for changing and washing their own bedlinen and towels. I take 2 days as one is for household washing - bathmats, doormats, kitchen cloths etc. We've been running this since August and it works well. The Washer Of The Day also distributes the last wash from the previous day as well as the washes they do in the day. Putting one wash on at 8am the ignoring it til the following day when it's someone else's problem gets you marched back to the machine to complete the process!
Meal planning - I plan protein for every day and largely cook it plain with 4 veg options and 1 carb and possibly a gravy / sauce. This allows for food foibles (2 of mine have sensory issues around food), changing minds on flavours, adjustment for who is in and who is out.
Shopping - I try for once a week. Anything added to the shopping list will be purchased, incl. toiletries etc. If you don't ask for it, I don't buy it. Milk from the milkman daily as it's easier to adjust and stay on top of.
We have a rota for dog walking, which can be adjusted if you can swap with another family member.
Everyone sets the table. You clear your own place afterwards. Those who cooked don't do extra clearing. Emptying the dishwasher in the morning usually gets you a pass from reloading later in the day, but I really like the ticks idea from upthread.
Hope some of this is useful!