The best way to cheer yourself up is to try to cheer somebody else up.

Related:

• If you want to cheer up,
  cheer up someone...
• Cheer up,
  you'll soon be dead...
• Cheer up man.
  The worst is yet to come...
• Cheer Up!
  Things are getting worse at a slower rate...
• Hey, you know what'd cheer you up? You should get yourself a puppy." -Amy "A puppy?
  Nibbler loved to eat puppies...." ...
• The best of healers is good
  cheer. --...
• THE PROGRAMMERS' CHEER? - SHIFT TO THE LEFT, SHIFT TO THE RIGHT!
  POP UP, PUSH DOWN, BYTE, BYTE, BYTE...