I love this quote by President Monson. It gives me comfort when something goes differently than I had planned out in my mind. I need to have the faith that Heavenly Father is in charge and knows what is best for me.
"Often doors have closed before you that seemed to lead to opportunities you thought you had to have. You may have assumed that the closed door was a reflection of some inadequacy in yourself; but perhaps the closed door had nothing to do with whether you were good or bad or capable or incompetent. Rather, even now a loving Father shapes your path according to a prearranged, premortal covenant; the opening or the closing of these various doors is dependent on the Lord's perfect perception of your developmental needs... He says that he does nothing save it be for the benefit of the world. He has promised that, if you will be faithful, all things will work together for your good in order that you may be conformed to the image of His Son."