When you are planning to take an action shot in advance, get educated about the subject matter. You cannot take a good shot of something that is moving if you don't understand the types of movement involved. Learn about the movements of the subject matter and it will show in your photos.
If you are having difficulty holding your camera straight, purchase a tripod. A tripod will go a long way in helping to keep your camera in place, so you can focus on other variables other than balance. Tripods work great if you are in the wilderness or on an uneven terrain.
Amazing wedding photography by Chris Van Atta. Destination wedding photographer for Greenville SC, Asheville NC and Charlotte.