1) Declutter your house, room by room. Take one room. Any room. And empty it out. Perhaps not all the furniture, but everything on the floor or on the furniture, and maybe some small furniture. Move it into another room. Then after a vacuum and cleanup job, move select items back into that room. At the end you should have a nice-looking room. Not perfect, but the framework is there.
Do this room by room. In the end you'll have a mass of stuff somewhere in the house. One poor room is going to have a lot of extra stuff into it. What you do here is decide what you are going to do with the rest of the stuff. I recommend the following method:
2) Create piles based on content. For example a pile of clothes that are going to go somewhere. Knick-nacks or junk. Old toys. Perhaps you wish to garage sell them, or give them to relatives or Salvation Army or Goodwill. Or put them in storage. Heck, be prepared to throw it all away. Bottom line is, you _have_ to do something with it all. It shouldn't be in your house any more. This is all stuff that didn't make the cut. If your home is cluttered. Some stuff has to go. It has to. Because otherwise it makes maintaining your house much harder. That's _more stuff_ to clean every day. THAT is what makes housework so hard.
3) Preventing a "recluttering" of your home by a) throwing away old items when you buy/are given new items. Get a whole new batch of clothes and toys? Start looking at the old items that you might want to hand down to someone else outside of your home. And b) consider buying more storage containers, dressers, etc. Anything that helps you store more items, and keep things off the floor and out of sight.
4) Lastly, everyone in the household has to assume responsibilities over certain areas. No brainer stuff like kids are in charge of their rooms, and toys around the house, parents split certain duties, etc. But I recommend a further step. Guardianship. What that is is someone will take a responsibility to oversee someone else's work in another area. They can a) positively guide the other person to finishing their work or b) help the other person in trade for upkeep in their other areas. Often two heads are better than one. And two people working together in two different areas might be more successful than being split up.
I'll give an example of the last one. My wife and I share dish-washing responsibilities. For example she loads the dishes into the dishwasher, I unload them. But countless times I'll do her job or she'll do mine. Or we'll work together and load it, put the load on, and later on unload it.
Anyhow, I hope this helps. And if you have some ideas or suggestions, post them in replies.
LOL oh my goodness yes it does happen varily everywhere.