I have a box in the basement where I immediately put anything in my hand that makes me think "why do I have this". When the box gets full I take it and donate the items. It's not a huge box so I'm never overwhelmed but do end up making donation trips with now much stuff. However, I like the ongoing method.
I do appreciate your description of how you sorted your pieces, Linda, and can see myself doing something similar but rather than taking it to a random thrift store I will offer free on Facebook or to other quilters I know. Thanks for the inspiration.