1. Keep your cheek down on the stock. Sometimes shooters have the desire to see the result and actuall will pull their head up as the shot goes off of even just before, causing a miss. Goes along with follow through
2. Try to miss in front. Sounds silly but if you are going to miss make sure it was in front of the bird, you'll be surprised at how many of those ridiculous leads will drop birds.
3. Shoot some skeet or sporting clays. Practice, practice practice.
4. Don't get discouraged, its not a trophy elk, they are doves, they should be fun to hunt, when you miss laugh at yourself and wait for the next shot, don't let them little grey rascals get inside your head.