The following is a several basic tips we have learnt along the way, we hope that they may assist you with your photography.
I tried to describe all the things more simple.

General:
Bad or lackluster photos are caused from laziness. Unfortunately, too many photographers, amateurs and professionals, will approach a photo assignment with a pre-conceived notion of attack - mostly from "history of style" and wanting to play it safe.
Rarely, will the photographer step back, put down the camera and size up the assignment before proceeding. Instead, many of us will execute the photo from the angle we initially approached the subject, never thinking to study the subject and its environment first.

Hold It Steady:
A problem with many photographs is that they're blurry. Avoid 'camera shake' by holding the camera steady.
Use both hands, resting your elbows on your chest, or use a wall for support. Relax, don't tense up. You're a marksman/woman holding a gun and it must be steady to shoot.

Light:
Light is the most important element of any photography, the difference between a great photograph and an average one is often only the light in which it was captured.

Day Time:
The best time for bird photography also coincides with when the birds are most active, i.e. early mornings or late afternoon.
The light at these times is softer and more pleasing to the eye. Photographing in the middle of the day is usually only acceptable if it is overcast, other than then you are wasting your time.

Opportunity:
Opportunity plays a big part in bird photography, whether it is being prepared for what ever may happen, or by creating the opportunities that increase your chances of a good shot. Generally we never go out to get a specific shot, we wait to see what opportunities we are given, thus eliminating frustration with the introduction of chance.

Time Factor:
Time is very important, when photographing birds, we rarely use hides and prefer to spend a great deal of time in one area.
By doing this, the wild life eventually accepts that you are not a threat to it, and in some cases their curiosity may even get the better of them, and they pay you an even closer visit than expected.

Depth of the picture:
Depth is an important quality of good photographs. We want the viewer to think that they're not looking at a flat picture, but through a window, into a three-dimensional world. Add pointers to assist the eye. If your subject is a distant mountain, add a person or a tree in the foreground. A wide angle lens can exaggerate this perspective.

Location:
location is another important consideration, there is no point being where the birds aren't. When visiting new areas, keep in mind a source of fresh water, may be a good place to start, also places like valleys tend to act as highways for birds, visiting different habitats will allow you to experience a greater diversity of birdlife, and hence offer greater opportunities.

Behaivor:
Be thoughtful of birds and other animals when photographing them, never put their safety into question.
Be aware that you could upset their breeding patterns with inappropriate behavior. Avoid photographing nesting birds and be sure not to unduly stress a bird for the sake of a photo.

Enjoy your time spent in nature, it helps you understand that we are all part a of nature, not apart from it. If you get some great shots that's good but if you don't you still had the chance to commune with nature which is better.