I bought a bag of ribbon at one of the local thrift shops for about 75 cents. When I got home I decided to get it all organized. A few of the bundles were bias tape and edging, so I put those in my drawer for later.
As for the ribbon, I took an empty toilet paper roll and taped a free end of each color of ribbon to it.
I carefully rolled up all three colors of ribbon onto the tube, and used a straight pin to secure the loose end of each color once it was all rolled up. There ya go! Got more colors to roll up? Use a paper towel tube!