I forgot that I had found the most amazing quote and passage about gratitude.

"To express gratitude is gracious and honorable, to enact gratitude is generous and noble, but to live with gratitude ever in our hearts is to touch heaven." -President Thomas S. Monson

And from True to the Faith, "The Lord has promised, “He who receiveth all things with thankfulness shall be made glorious” (D&C 78:19). Gratitude is an uplifting, exalting attitude. You can probably say from experience that you are happier when you have gratitude in your heart. You cannot be bitter, resentful, or mean-spirited when you are grateful. Be thankful for the wonderful blessings that are yours. Be grateful for the tremendous opportunities you have. Be thankful to your parents. Let them know of your gratitude. Thank your friends and your teachers. Express appreciation to everyone who does you a favor or assists you in any way. Thank your Heavenly Father for His goodness to you. You can express your gratitude to God by acknowledging His hand in all things, thanking Him for all that He gives you, keeping His commandments, and serving others. Thank Him for His Beloved Son, Jesus Christ. Express thanks for the Savior’s great example, for His teachings, for His outreaching hand to lift and help, for His infinite Atonement. Thank the Lord for His restored Church. Thank Him for all that it offers you. Thank Him for friends and family. Let a spirit of thanksgiving guide and bless your days and nights. Work at being grateful. You will find that it yields wonderful results."