When you find yourself down and depressed you can often find relief in serving others, especially those closest to you. Clean the kitchen for your mom, organize the garage for your dad, play a sibling's favorite game, or just pick up a snow shovel and drive around your ward looking for a walkway to clear. It may seem too small or simple to make a great difference, but you'll find yourself a little happier with each act of service. It is often when we are lifting other's burdens that God lifts ours.