In my house there is DP & I, as well as 2 DD (11 & 13)
I spend all day Sunday making sure that I have as much ready as possible to last the week, so 5 x days worth of uniform & work clothes are washed, and ironed, food shopping is done.
I know what we're having every night for dinner.
I make up packed lunches the night before.
I clean my kitchen every night after cooking.
I clean my bathroom sinks (3) whilst cleaning my teeth in the morning.
I also go around every morning and put bleach down the loos.
I fluff the sofa cushions before I leave the house (I know that sounds silly, but it makes such a difference to walking in from work, and seeing them thrown on the floor)
I sweep my floors downstairs every night.
I'm lucky that I don't work Fridays so that is when I do my big clean. But keeping on top of the little things, makes Fridays much easier for me.
My only motivation is that I'd hate to give my MIL ammunition
if I don't do it, no one else will, and I am a very stressy person, so being organised eases my stress a little.
I've also given the kids a list of things for them to do daily, make bed, open curtains, dirty clothes in basket etc....
I do have days when I can't be bothered, and would rather sit in front of the TV, but I stick my iPod on one of the kids speakers, and blast my music as loud as possible, that usually gets me going (the mop is quite a good dance partner)