White vinegar is a miracle cleaner.
Don't put something down put it away.
If it takes less than 3 minutes do it now
Use a big basket (laundry basket ideal) as you tidy up. So sort the living room and throw all the upstairs stuff on the basket have another for kitchen stuff. Then you just take the basket to the designated room put it all away and use it for the crap left in they room.
Clean kitchen while you cook. Clean bathroom while you bath kids
Heated clothes airer. When you wash the bedding throw a sheet over it and it dries inside much quicker.
Multiple layers of sheets/waterproof sheets on the kids beds. I also keep a clean and made up duvet and pillow in a storage bag under the bed. Then if kid wets bed/is sick etc you strip it and throw clean duvet on with ease
Teach kids to bring their plates out after dinner and put in dishwasher. My 2 year old will bring his plate out. Give kids chores. My big ones do more but 2 year old passes me the washing when we hang it (and then needs distraction asap before he starts pulling it off again!)
Shark steam and scrub mop. It's a steam mop that has rotating cloths on the bottom. Amazing
Batch cook and freeze! Whole meals like shepherds pie and lasagna but also the base veg for other dishes.
Silicone baking stuff. Soooo much easier to clean
Online food shop. Delivery of toilet paper and cleaning products etc.