I'm a bit sentimental. I keep the things that important people in my life have given me.
This tends to create "boxes of stuff". Not BIG boxes, shoeboxes of stuff.
My stuff reminds me of the happy moments in my life.
My Daughter gave me an apple in October 2005. I put it in the fridge and it ended up in the back ... for a year it aged there. Then I took a picture of it and put it back.
This image below is an apple's life documented over the course of three years.
I finally threw out the apple, it was getting way too old.