Make use of the instant feedback you get from a digital camera. The screen on your digital camera can show you the basics of how your photo came out the instant you snap the shot. Learn from your mistakes and take another shot, there's no need to wait for your prints anymore.
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.
Here is my video on how to edit fashion blogger style portraits. Model: @stephanie_danielle My instagram: https://instagram.com/caliallstaring/