Use speed when capturing your pictures. If you take too long, the subject could move, the sun could move behind a cloud or it could start raining. Anything could happen, so don't delay. A camera which allows you to make quick photos will give you the best results.
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.
One of the key ways to take great photographs is to take lots and lots of them, so buy a large memory card that can hold them all. By increasing the size of the memory card that you use in your camera, you are increasing the number of photos that you can take before changing cards. A large card will also allow you to use RAW format so you can take advantage of the additional flexibility it offers.