One thing to look at is your current storage furniture--dressers, end tables, coffee tables, bookcases, shelving units.
I found that because I lived in small houses or apartments, I tended to buy small furniture. So I ended up with a lot of small storage pieces that worked, but they themselves ended up making the space look cluttered. One place I lived had huge closets, so I bought a lot of those plastic drawer units to go in them and hold various stuff.
When I replaced seven small bookcases with three matching tall ones, all my books still fit, but the three bookcases lined up on one wall looked better and took up less floor space. When I got a larger coffee table, but one with a bottom shelf and two drawers, a lot of the clutter that used to live on top of the coffee table found a home and wasn't visible all the time.
Those plastic drawer units held my stuff even after I moved out of the apartment with the huge closets, but I had to have them out in the open because I never had large, lovely closets again. And looking at 4 not-very-attractive plastic storage units all the time did nothing for me, and less for the decor of the apartment. I found an attractive vintage dresser that sits in my living room and looks like a console and holds all the stuff from the drawer units, but looks 100 times better.
So probably you need to declutter a bit. Most of us do. But take a good look at the belongings you have left, after the decluttering, and see if you can't re-envision ways to consolidate them into fewer, but larger, storage pieces.