I am ruthless. the present Mrs Hughes is the total opposite.
Occupying our garage is a collection of children's school notebooks from children she taught twenty-five years ago. They have not ben touched since we moved house nearly nine years ago!
In our previous house, the understairs cupboard was so full of rubbish that the door would not close. When Mrs H. went away on holiday with the children, I hired a skip and emptied it completely, and all that was left was the garden chairs and a battery charger.
On her return, the present Mrs H. went predictably ballistic, until I challenged her to name three things I had discarded and she was unable to do so.
You have to drop the 'this might be useful' mind set - if you haven't used it in a year, it's not that useful, and if you need it, you can buy another one.
Set aside all the sentimental items which are irreplaceable, and then take a deep breath and bin the rest. After a day or so's fretting, you will have forgotten what you have got rid of!