Tutorial: DIY Tissue Paper Pom-Poms this tutorial is pretty good. Use square sheets or tissue for a rounder Pom Pom. Tie the middle with ribbon and tied several on ribbon and hung them for a backdrop. Use thin tissue paper and fluff gently.
How to make tiny pom poms with a fork. Wrap yarn around fork until fat, then cut. Take a small piece of yarn and tie entire bunch together so that the knot fits through the prongs of the fork. Take off of fork and cut all the loops.