One way this was said by one lady in a tv show was to not use your home as storage. By home she meant hallways, on top of furniture and so on. It makes your home look more like a storage unit and less like a house.
It helped me to start putting things away in drawers and so on, but also to think about how often I use them, or if I still need them.
IIRC there were some studies on where people in the US spend their waking hours at home and, at the time, for most people, it was overwhelmingly the bathroom and the kitchen/dining-area. The dining area especially was where everyone did their bills and homework and such, and where mail got left when it came in from the mailbox. I think a bad misreading of those results was why builders wasted kitchen space on built-in desks for a bunch of years, before everyone realized how dumb that was and knocked it off.
(this wasn't factoring in WFH, of course—I think most of the important original work was done in like the 70s)
It helped me to start putting things away in drawers and so on, but also to think about how often I use them, or if I still need them.
The tv show was about "proffesional organizers".