At the knitting festival in Pittsburgh a few months ago, they had free tutorials teaching us how to make long scrap necklaces from all the extra bits of yarn they had. I made a few, I really love the colors, and the idea of scrap jewelry.
Some more tutorials:
Yarn Remnants Necklace from CraftStylish,
Fabric Ball Necklace from Cut out + Keep,
Fabric Bouquet Bib Necklace from See Cate Create,
Lace + Bead Necklace from Clever Nesting,
Scrap Sandwich Necklace at Craftster,