A memento is an object or item that serves to remind one of a person, past event, etc.; keepsake; souvenir.
An essential part of getting organized is to simplify and let go of unnecessary things, so you can enjoy the things that really matter. Over and over I see clients regard inanimate objects as more important than their own well-being. They hold on to stuff when it actually takes away from the quality of their life.
Buying and keeping objects can be a good thing; something that enhances the quality of life. But when you become a slave to your possessions and move them from room to room, or have to step over the pile they have ended up in, they become a problem.
I encourage you to let go of things that don’t make your life better. You say, “I can’t get rid of that because it’s a memento”. But when you can’t remember what it reminds you of, or you haven’t made use of it in years, it has just become a thing.
Let go of those things to make way for peace of mind and more space.