The reality is, we can't.
That's the bad news. The good news is, the reality is God can through us. In a post below one of the readers commented and asked how much of our time should be spent focused on the things we need to do to clear the way for God.
The answer is almost none at all. The miracle of divine union is accomplished by God alone. There is very little we can do to aid its progress. There is remarkably little we can do to achieve detachment. There is very little we can do to deepen prayer.
But our little is the widow's mite. We offer it out of our poverty. And it is the greatest treasure God can have from us. As a father, one of the most precious things my son can give me is something, however naively done that has taken him some time. He has produced reams of art the paper the wall of my cubicle and each piece is precious because each piece represents a time when he was thinking about his daddy. So it is with our Father in Heaven. No matter how poorly done, our little widow's mite is infinitely precious to Him. Praise God there are no cubicles in heaven, but if there were, they would be peppered with these little offerings, the signs of our attention to our Heavenly Father.
So, how do we accomplish miracles? We turn to our Father in heaven and say, "Abba, Daddy, Please!"