The short cut to disappointment goes through unrealistic expectations. When you are a man and you need 10.5 seconds to run the 100-meter and you expect yourself to be the gold medal winner at the Olympic Summer Games in 2012, you will be disappointed at the finish. Even if Usain Bolt falls ill that day, there are still others to beat you by lengths.
When you experience the feeling of disappointment in photography, ask yourself what you expected to happen and if this was realistic. Did you buy a new camera, expecting everything would go by itself now? Or did you photograph a house in the style you saw in a magazine, expecting that your image would be on the next cover? Reflect on your thoughts that lead to the expectations, what were they based on and what was the outcome. By doing that your disappointment will be converted into realistic plans to accomplish your photography dreams.