Here was a nice site sent to me.  Very inspiring:
http://www.ewtn.com/motherteresa/index.htm

Some of my favs:
"Give God permission" to work through you. "The work is God’s work. The poor are the Lord’s poor. Put yourself completely under the influence of Jesus, so that He may think His thoughts with your mind, and do His work through your hands." - Mother Theresa

and...

Mother Theresa told the story of two young sisters whom she sent out to help a dying person. Before they departed she reminded them how reverently the priest handles the Body of Christ at Mass. She told them to have the same reverence for the bodies of the poor and the dying. Three hours later the sisters returned and told Mother Teresa how they washed and cared for the dying man taken from the gutters. The youngest sister said to her: Mother, for the past few hours we were washing the Body of Christ!