When we are so concerned with what's next...we steal attention from the present. When the mind becomes focused exclusively on the future, pretty soon we're not in the present at all.
When you are on a journey, it's certainly helpful to know where you are going...but don't forget that the only thing that is ultimately real about your journey is the step that you are taking at this moment.
It’s important to have long term goals and dreams that you want to accomplish. Just make sure you understand what the necessary steps are to getting there.