This prayer of St. Ignatius of Loyola would be a good prayer for her to use on a daily basis:
Receive, O Lord, all my liberty. Take my memory, my understanding, and my entire will. Whatsoever I have or hold, Thou hast given it; I give it all back to Thee, and commit it to be wholly governed by Thy will. Thy love and Thy grace give unto me, and I am rich enough, and ask for nothing more.