When we practice we focus on our playing and marching, but it's also great to watch videos of those who came before you. Here are the last 10 years of WGI Percussion Gold Medal performances. As you watch, step out of the "spectator" role and watch with an analytical mindset. 

How do they look? What are their hands doing? How do their feet move? What is the energy level? How do they express emotions? Is the show concept straight forward, or more conceptual?

There are many other great shows, so do more research than this, but these performances should get you started. Enjoy!