When I am working on a scarf, , and need to set it down, I always end up wrapping it around the skein of yarn and fastening it with the crochet hook. This is just about the only type of project where I don’t tend to have to go searching for the hook at some point. If only all projects could be so tidy.
alookatthelittlethings 
That’s a great idea.
Too bad it only works for a scarf. 🙂
Great idea
It’s nice to have one project where the hook doesn’t fall to the bottom of the bag.