Steve, Dirtsailor has a good list to add to what you've already done. If you're satisfied with the things that you've done, do them again and again until you make a really bad mistake. Then figure out what the problem is and try again. In other words, there are so many variables and other issues that may arise with each cook that can upset the works. It's the practice that makes us better cooks, and understanding the different things that make a difference, ie, Temperature, humidity, type of wood, each piece of wood, how we manage the fire, cut of meat, density of the meat, marbelling, etc, etc.
The act of continued practice to make each cook better doesn't depend on whether we have cooked it before, just trying to improve. Steve, expand your menu however you choose, and enjoy what you do. After all, it's the fun that matters most.
Good luck and keep on smokin', Joe