If you have never visited Clairity's Place, go do so now and read this post reflecting on Pope John Paul II as an image of St. Christopher. I particularly appreciate the comparison as I took Christopher as my confirmation name (although for less then noble reasons at the time).
A prayer from my prayerbook asking for St. Christopher's intercession:
"St. Christopher, Holy Helper, strong, simple and kind, after your conversion you sought a way to use your talents for the greater glory of God. Having no gifts for preaching, fasting or prayer, you gave of your strength by carrying travelers across the dangerous currents of a river. Pray for us that we too might place all our gifts, whatever they might be, at the service of the Kingdom. Christ-bearer, dedicated to serving the Lord by serving your fellow man, pray that we not fail to show charity to those strangers we meet each day, knowing that hidden within each we may find Christ, the One who created the world. Amen."