If you would like to reduce the number of possessions you own by 50% you could park your car in the garage. You're welcome.
Life hacks ^
You also have keys to each so that's at least 4 items, and then your clothes and computer, i'm sure you have soap and toothbrush and toothpaste, and hopefully you have toilet paper and a bed, and having a bed means you likely have a pillow, pillow cover, sheet, blanket, and mattress, etc
I count all those as parts of the above!
(Counting owned items can get entirely silly).
I don't own anything at all, but my wife sure does have a lot of stuff I use often that she never uses, and happen to be in a men's large.
G. Gordon Liddy of Watergate fame once said something on his radio show along the lines of "well, as a convicted felon, I'm not allowed to own firearms. However, Mrs. Liddy has a large collection that she occasionally allows me to use under her supervision."