Actually nothing except real estate agents have to eat too. Especially, real Texas style BBQ, which means that the meat is cooked by smoke, not directly over the heat. That is what is called. Grilling
If you aren't aware of it, there is a fabulous website with lots and lots of information, a free monthly email newsletter, as well as a blog from people who take this very seriously. But, they are very nice to weekend warriors on their Weber.
It;s free to join the site.