A recent project I made can demonstrate what I am talking about.
I have been working on making envelopes and cards lately and while going through my stash of calendars I came across one that I brought home from Mom and Dad's sometime last year. The year of the Calendar? 1975. Before I was ever born. It had been sitting in Mom's trunk for a good many years along with other paper mementos.
I decided to use it to make a set of envelopes and cards. While using them I had fun looking at all the things written on it (mostly names of people on their Birthdays) and thinking about how Mom and Dad used this when there was just one little boy, my brother Peter, before we other 5 ever arrived. The calendar came from a sporting goods store in Iowa where my Dad had worked. If I remember right during the year 1975 my parents lived in Florida, Jamaica and Iowa and then after that year the calendar would have moved with them to Nebraska (where I was born) and then up to MN. That calendar has done some traveling. :-)
I do think there is value in saving things but I am also coming to realize that stuff can cause stress as well so this year I have been working hard to go through the things I have stashed away and use up a lot of it. My stashes had grown too large and it was time to do some purging. That is why I had "Denim Days" and now I have been focusing on Paper projects and why we have been making all sorts of fun rag rugs.
They only drawback though to going through everything is that I may not have the fun of creating while thinking about the memories associated with something 20 years ago or even from before I was born. :-)
Do you have stashes of stuff at your place? Are you a "pack rat" or somebody that cleans things out quickly?