Many people may say that luck is important, but I think you create your own luck by working hard to ensure you don't miss opportunities. Personally, I've learned about perseverance, when you hear the word 'No,' and when you hear rejection, that it's not always final. And that timing is everything, and you have to stay the course and just keep working hard and know that, when your time comes, that it will be sweet and that it will be the perfect time.
I would encourage you to set really high goals. Set goals that, when you set them, you think they're impossible. But then every day you can work towards them, and anything is possible, so keep working hard and follow your dreams.