O bless your heart. My parents retired to Florida in 1966...they had lived in their home for 40 years and there was stuff galore. It was a huge task to go through everything. A lot of things came to Florida just for the ride...they were never used after they arrived. So I hope I learned fromt that.
I am in the process of moving and I have stuff that I have dragged around for 35 years. My motto is, if it is someting that I have not seen or used or worn in the last year (it used to be 2 but that is not my thought at this juncture), it is time to let go of it, via Salvation Army, Goodwill, yard sales, local churches, or recycling centers.
If you come across something that is broken and cannot be reparied toss it.
Set up a series of containers, label...save (those will go with you), Salvation Army, Goodwill, Church, yard sales, recycling center, trash.
Handle each thing ONCE. Pick it up, make a decision, and move on.
If you have a lot of time and you know YOU want to make the decisions about what goes in each container, then begin. If, however, you have helpers who know what you can live without, enlist help.
Happy packing ...I am right there with you.