I recommend you dispose of anything that does not fall into one of three categories: currently in use, needed for a limited period of time, or must be kept indefinitely.
Your past will become a weight that holds you back and keeps you from living in the here and now. To put things in order means to put your past in order, too.
Human beings can only truly cherish a limited number of things at one time. As I am both lazy and forgetful, I can’t take proper care of too many things.
I’m sure most of us have been scolded for not tidying up our rooms, but how many of our parents consciously taught us how to tidy as part of our upbringing?