Goodness, I have fabrics that date back to the 20's. For that type fabric I do traditional patterns that were popular during that era. For other fabric, I overdye it a lot. Its a way to make old fabric new again. I use powder dye from Dharma Trading Co. They have excellent information on how to use the products.
Also use up some of my "what in the world was I thinking" fabrics for backings. Good conversation starters when I show them at guild. grin