As much as you can in closed cupboard - ie long bathroom cupboard with doors will reduce clutter and cleaning; storage chest in bedroom, living room to keep bulky stuff out of sight - also reduces tidying /cleaning.
Hall or entryway storage to keep coats/shoes/bags as tidy as possible. Only have out what you are currently using if possible.
If storage space is limited (mine is non existent), consider divans with drawer space, a big enough wardrobe to get as much stuff out of sight in. Regular culls of things you don’t wear, use, are finished with or are broken.
keep only things you use on a daily basis on kitchen counter. As much as possible in cupboards or drawers . Don’t keep anything you don’t use or is chipped or broken. A letter rack or notice board to keep paperwork in/on. No crap on fridge door as looks a mess.
I live in a tiny flat so keep things on display a few things I love. I have a few really big pictures, a few big plants, a coffee table with a tray with candles on and a plant. I don’t have things on display just because - I don’t keep books apart from a handful that I re-read from time to time. I don’t want books just to show i read books. I don’t care about looking cultured or ‘interesting’. .
I use the library and charity shop where possible.
I keep only the furniture I need and use. I don’t have space for anything that isn’t in daily use.
All bedding, towels and curtains are white. Bedding is seersucker so doesn’t need ironing to look nice. No scatter cushions on bed. I have olive green walls and really bright pictures and sofa cushions and throws. Lots of candles. The place looks simple, neat and hopefully cosy and inviting. I air the rooms daily and use wax melts - refreshing smells like lime/basil and mandarin in summer and orange and clove in winter .
Obviously as I live on my own, I don’t have anyone else’s likes and needs to consider, which makes things considerably simpler and easier