Expectations are an interesting topic. Many times we are hoping we will get return much more than we invested. Initially, sounds make sense. You have x amount of time or money, so you want to get the highest return as possible as you can.
I am pretty well known as an optimistic guy. But, I always calculate the worst scenario. You can’t always win. (Most of the time you won’t win anyway, I need to write something about this ) At least, you should forecast the worst, mediocre and highest return in the beginning. Then you will have clear expectations.
So many internal and external factors are playing a crucial role in our lives. Even if you know your field more than a Bedouin knows about sand, still you can’t calculate everything. Don’t expect all the time you are going to win. Most of them won’t. And be ok with that.