I was in this situation a few years ago. I inherited a bunch of stuff from my great-grandparents (over 70 years worth of stuff). I started off by get rid of or selling things that did not mean so much to me. As the years have went on, I have been slowly letting other things go. When I decide to let more stuff go, I have a contact that take things on consignment. Once I have some stuff boxed up, I call him to come pick it up. I've been contacting him about once a year.
If you decide that you might be interested in going this route, send me a pm and I'll give you his contact info.