Originally Posted by USMC
If you do decide to go gadget crazy, get the Pitmaster IQ 120. It tells you your pit temp, food temp, and controls your airflow for steady temps. It is the best accessory I've ever bought for my WSM.
I have this too and it is great for long, overnight cooks. Any short or daytime cooks, I usually don't use it and go a la natural...
Lone Star Grillz Insulated Cabinet Smoker
Weber Genesis S-330
For info on any mods I have done to my WSM, please see this post