The clever people over at Threads Magazine have come up with an ingenious way to speed up the production of yo-yos.
Now, I personally like the slow & meditative pace of hand-sewing yo-yos, but this method sounds fantastic for those projects that need to get done right now.
Basically, you’re using the embroidery hoop of your sewing machine to stabilize the yo-yo fabric as you sew around it.  Go check out the article for the complete details.