All of us have a certain amount of energy. Use it well. Honor your energy. Prioritize You know, or are beginning to get the idea, that you cannot control anything. As mentioned above, things happen without your permission.
Rigid things break and flexible things bend.
It is a simple law of nature. Do not ignore it, for eventually it will catch up with you. Also, things that are important to you today may not be as important in the future. Any plan without the provision for continual self-examination will ultimately fail. Too many elements in life change without your permission not to factor them into your formula for your life goals.