It comes down to confidence. half the battle is selling yourself as a creator of a show.
You’re not just going, “Hey, I’ve got a really funny idea that I wrote on a napkin”; you’re saying, “I’m super-passionate about this; I can execute it week after week; this is why I think it goes beyond just a two-line idea.”
http://www.hollywoodreporter.com/news/bill-lawrence-cougar-town-263648