This is perhaps my greatest logistics struggle. Being a bit older than most of the crowd here, I have accumulated non-trivial collections of books, movies, and music. Most of the life I keep away from people is in a storage unit.
I haven't the time/space to devote to selling everything, not to mention the attention it will attract.
No, you cannot just show up to a library and dump all of your stuff on them. They do not want it. My first experience with Half-Price Books was something of a joke; I may try a second.
I haven't a good solution for this as of yet.
In the end, I am throwing myself away because I am worthless; perhaps it is best if I view my possessions not as carriers of value but as the valueless empty wrappers for experiences (reading, watching, listening) that I am going to discard anyway.