I have been learning the 'new reality' as in 'it is all in your mind and is never going to happen and you will never do xyz' and 'enough is enough'! 
When we decided to move I started down-sizing, passing things on to the family or friends, recycled, gave to charity shops and took other stuff to the tip. I thought we had done really well but have continued clearing since the move and can see a very organised and clutter free home emerging now.
DH has been severely challenged in his man-cave, garage and shed and has started to clear these areas himself as he sees the time coming when his are the only areas which need attention. He knows what might happen then!
I just want everything to be organised, although still a comfy home, so that when we shuffle off the DC have the minimum to do.
There is clearly a line between being a careful manager and a hoarder. If you keep things too long they become of no use to man nor beast and just become tip fodder.
I had a friend who kept everything which just might be useful to the point that her home was a danger for her to live in and she needed help to make it liveable again. She no longer had a choice and it was very difficult for her, I think it hastened her end. 