Let your passion fuel the fire in your belly. Find your calling, and feed it with hard work and undying commitment. Let every setback be the spark to get better, and learn from your failures.
There is no magic potion that serves as the catalyst to finding ones driving force. Sometimes it is innate, sometimes we discover it by accident, and sometimes the powers of the universe collide so that it all makes sense. Either way, when it all comes together — watch out world.