Here's a favorite prayer of mine from Thomas A Kempis' The Imitation of Christ. May this prayer encourage your heart as it does mine:
Lord, You know what is best; let this be done or that be done as You please. Give what You will, as much as You will, when You will. Do with me as You know best, as will most please You, and will be for Your greater honor. Place me where You will and deal with me freely in all things. I am in Your hand; turn me about whichever way You will. Behold, I am Your servant, ready to obey in all things. Not for myself do I desire to live, but for You - would that I could do this worthily and perfectly!