Don't you just hate to run out of bobbin thread midway of piecing a big project? Here's my trick....before I begin a big project, I prewind several bobbins using the Simplicity Sidewinder portable bobbin winder. You can find these handy dandy must-have tools at your local fabric store. After I have several bobbins ready, I attach them to my pincushion/sewing caddy with a beaded hat pin. Voila! Bobbins at the ready. A beaded hat pin is included with each of my handmade pincushions. How do you bobbin?