It’s not who you know, but rather who knows you. One great example of this is how I became a judge on DIY Dominator. A very good friend of mine worked on the show, and when they needed a judge she told them about this incredibly talented person with a great personality. And when that person declined, my friend remembered that I was probably available.
The show is located here. (http://www.diynetwork.com/diy-dominator/deck-building/index.html)
It was an absolute blast to do the show, and I hope an opportunity like this presents itself again.