There are many of you that turn the process of goal setting into a painful chore by the way you set it up. You then give up.
SMART goals are used by average people, not by high performers. The problem with SMART goals is the 'Realistic' part. You are judging based upon your current capabilities, and therefore setting a goal based upon what you already know how to do. The unconscious mind then has nothing to change, i.e. no development or growth.
The whole point of setting a goal is to develop and grow as a person.
PROGRESS EQUALS HAPPINESS.
You need to set goals that you think are beyond what you are capable of doing, but yet if you did somehow manage to achieve it, it would be the best thing EVER!!
The point is the Constant and Never-Ending Improvement (CAN-I). Even if you don't reach the stars, you will progress dramatically, enjoy the journey, and be happy in the process.