Life is 10% of what happens to you and 90% of how you react to it. You can't control fate or the actions of others, but you can control your reaction when something goes wrong or things don't go your way. Keeping a positive spin on things can help even the worst situation seem more bearable. Even the most successful men and women in the world have a bad day once in a while. They typically react to the negative events with optimism though, and that is what helps make them so successful.
When you keep moving forward and you keep positive thoughts in your mind and a smile on your face you will go much further than if you allow life to overwhelm you. You don't need luck to reach your goals when you have confidence and you are motivated to persevere at any cost. You can't control life, but you can manage your reaction to the events that life throws at you so that they are not as negative.