There are no certainties only projections.
Every day of our lives, something unexpected happens. Every minute of our lives something takes place that we weren’t prepared for. A crack in the cement you didn’t see or anticipate. An email from someone you weren’t even thinking of. When it comes to your life goals, expect the unexpected. It WILL happen. The best we can do is prepare to deal with it when it does.
Plan for uncertainties
According to strategic thinking and planning you put into consideration your strengths, weakness, opportunities and threats. There are things that beyond your control but it doesn't mean you don't prepare to absorb their shock when they hit you. This is also applicable to life goals. You have to be prepared for uncertainties and also expect the unexpected.
Acknowledge the fact, and learn to accept that surprises and unexpected events are part of life and are unavoidable. When you accept this fact, to some extent, it will be easier to deal whatever happens in your life. Life is dynamic, not static. Change is part of life, and the sooner you acknowledge and accept this fact, the better it would be.
Self control and responsibility
If you're the type of person who blows up or lose your patience easily, then you need to lower your expectations and accept that you're, at least, partly responsible for causing the problem for expecting too much. Even if you're not the cause, you probably can handle the situation better, minimize the problem and avoid negative stress.
Evaluate the situation
When a situation arises, think about if you are ready? Do have an action plan and a backup plan in place? Did you react correctly? If you reacted differently, could you change the outcome situation? How's your self-control? It's your responsibility to be aware of your role, action and reactions in any situation.
You have take a look at things from the perspective that of what is the worst that could happen at every given time and then weigh your reactions. Take adequate risk measures and shield your heart by expecting the best and preparing for the worst.