A friend of mine did the following. She works full time, by the way, not a sahm, but found herself doing everything. So...
Didn't do much for a week, just the bare minimum. Then, come Friday night, she made the oh and kids do everything. Announced all weekend activities were cancelled. No pub night for Dh. Marched them round the house pleasantly explaining what needed doing. Then hovered over them all weekend politely issuing orders.
Walk the dog. Get your little sister's breakfast ready. Wash up, tidy up, tidy the house, vacuum, do the laundry, put it away, oh by the way we have to go shopping for food, go, plan meals for the next week on a budget, shop, carry home, put away, cook tea, clean up, mow the lawn, get everything ready for school, oh there's no time to do your football practice? Tough, etc etc. she drove them mercilessly all weekend.
Apparently her husband and kids were just gobsmacked at how much work goes into running a house with three kids. There were strops and tears. And... Significant improvement, and when it starts to slip she just threatens to do it again. Kids now get paid a small token amount and have a chore list. Her husband is still a lazy sack of uselessness in my opinion but the kids are shaping up nicely to be useful and housetrained.