I can't throw anything away. I belong to a guild and whatever I can't use I give to them to sell at their "boutique". That way they can make money for charities!
I also pick up things at garage sales and on Craigslist and Freecycle for them. What is someone's trash is truly someone else's treasure!
I even managed to pick up small scraps of a fabric my SIL needed to finish a queen size yo-yo quilt. She had enough to make 10 but only needed 8.