The greatest cure known is work.

Emotions are sometimes strange, volatile, and unpredictable. They do not always respond to logic and reason. They do, however, respond to action. If you have occasional feelings of loneliness, discouragement, or discontentment, the best way to kill such negative emotions is to work them to death. Almost nothing is as bad as it first seems, and there’s nothing like a hard day’s work to put everything in proper perspective. When you begin to feel negative emotions, dwelling on your misfortunes only makes you feel worse. Do your best to put them out of your mind and think about more positive, constructive things. Physical labour can help. Choose a task that doesn’t require a great deal of concentration, and then focus on accomplishing the task at hand.