What differentiates us from other animals is our ability to control and understand our own thoughts.
Our thoughts are at the source of all progress. Believing that your life is driven by chance and luck begets failure. You do not have good luck or bad luck, you have consequences and rewards for your negative or positive thoughts and actions.
If you want to succeed; believe, think, and act in the direction of your goals.
This is not to say that you have to control every part of your life. There is pleasure in the random and spontaneous. You can learn and grow from dealing with the unexpected that comes from putting yourself in a situation where you can not foresee the outcome. You will gain new skills and confidence in your ability to cope with the unexpected. Use these times to your advantage, and splice them into your life in places where they are not likely to divert or hamper your real long term plans.
Control, when it behooves you to control,
Flow when you want to see where the world takes you.
Make each one a conscious choice.