Floor wipes for the bathroom. The bargain shops have them at 50p a packet.
I always empty the bin just before it needs it.
Fold and put away washing straight away.
Bag of change for kids random school stuff.
I havent read Marie Kondo but know enough to chuck it out if it doesn't 'spark joy' it has made an amazing difference to the crap in the house.
For toys, my kids are young, I have a large zip pockets and a box for all the accessories that the toys need. Shapes for sorting or whatever.
Wipes in the car, each glove compartment, to clean faces.
Loads of easy meals I know will be eaten.
Loads of frozen milk, bread, bacon in the freezer.
When I can afford it a second tumble dryer. H still lives here but when he moves out it is scary going to the garage with the washing, the second tumble dryer would mean I'd get it through the day.
Always have two books of stamps.
Pound shop does blank packets of cards. Kids are going to paint on them and I'll use them for all occasions, cheaper too.
If I'm struggling, switching TV off when they are in bed means I get on with my jobs quickly then actually go to bed instead of wasting the evening.
Those snood things instead of hats and scarves.
Name stickers handy for new shoes, do immediately.
Stash tat for giving kids incase in need of emergency entertainment.
Never take the swimming stuff out of the car.
How old are your kids? Do you have somewhere that you can store bulk buying shopping?