I have a serious problem in terms of accumulating things since I am a collector. Huge amounts of clothes, books, stamp albums and stockbooks, DVDs, CDs, vinyl records, bicycles, and so on. Each time I thin out, there is a little space for a while, but then it's back to a full house, or flat, rather! I have more or less accepted this state of affairs, and it is not too hard since I live alone. I acquire, I enjoy and then, periodically, I let go.
So many of us feel your pain. LOL. I call my closet contents and so many other collections, the hoard! In my case, I think it was because I was deprived most of my life (just kidding). Living as a nomad for about 42 years (USAF and Govt. Civilian Service), we had to keep things light to accommodate the moves to a new location about every two to four years. Present day, as retirees, we just don't move a lot and I have been buying the books, clothes, shoes /boots and all manner of other stuff that has caught my fancy. I admire your approach drpeter, "I acquire, enjoy, and then periodically, let go."