We set goals. We go to work. And, we don't achieve them. Why?
First, life doesn't go the way we plan. Secondly, there is new information coming in all the time that impacts your work and goals. And, finally, you are in new territory so there is much you don't know about it. If you make any progress, even a small amount it's of note and you should be happy.
This is a short video explaining why we don't make our goals.