I really love Pom-Poms! they are so cute and are great additions to almost any craft. I have recently been making pom-poms for my knit beanies.
I use the Clover Pom Pom Maker, it is the fastest easiest way to make a pom-pom.
I have used many other DIY methods, my hands (great for big loose pom-poms), a fork (which is great for small pom-poms), card board, which I will never ever, ever use again, but is a way to make a pom-pom.