Be yourself. Above all, let who you are, what you are, what you believe shine through every sentence you write, every piece you finish.
When you are discontent, you always want more, more, more. Your desire can never be satisfied. But when you practice contentment, you can say to yourself, 'Oh yes - I already have everything that I really need.'
Indeed it can be argued that to make a powerful film you must care about the subject, therefore powerful films tend to be both political and partisan in nature.