Finding a pattern for leftover bits of yarn or one special skein is always a challenge. The Garter Loop-Through Scarf by Marci Richardson from the book Designer One-Skein Wonders is a good option. In both cases, I made the scarf longer and narrower.
One was made with about 160 yards of Gedifra Momentum, a worsted weight poly-cotton blend with a bit of sparkle.
I think this pattern will enter my repertoire of favorites.