My very smallest scraps, the ones I clip off edges as I sew, go into a big shell that my grandma bought on a long ago vacation. It sits on the shelf right by my sewing machine.
I save them to stitch onto cards I make - greeting type cards.
The very smallest scraps go onto my business cards. I purchased some of the business cards you can print on your computer. I position all the information on the right side of the card. That leaves room to decorate the left side with colorful fabric scraps. I just stitch them in place with my sewing machine.
It's thrifty - and people notice your cards. Here's a sample....