A method that works well for me is I create three piles. Yes, No and Maybe/Undecided.

When everything is in its pile, I go back to the Undecided. It's so easy to go through it that it surprises me! Most, if not all, easily goes into the No pile.

And Karen was spot on too. Year ago I read that a thing that I am hanging on to has a person associated with it. The article went on to say to ask yourself if you are ready to let go of the person. THEN, if you are, the item is much easier to give away.

Still have a couple of plastic bins with a lot of Undecideds in them...waiting for the day...