Start a trial separation on an item or two that you are on the fence about letting go. Put this/these items in a out of the way place where you won’t encounter them on a daily basis and wait to see if you seek them out. If they haven’t been used or missed in a few months then I think it would be safe to say it is time to let them go.
I got rid of about 6 larger boxes recently that I had been saving. I don’t keep but a tiny bit of inside box type packaging on hand to recycle when I need it. Maybe one piece of bubble wrap. Tomorrow, I will be recycling a sheet of Christmas paper I got on a gift at church Sunday to wrap a gift. I don’t normally do gifts, so don’t keep holiday paper, but I have a gift for my sister this year.
Yes, call me Scrooge.