I wanted the world to sit back, listen up, and let me explain to it that when someone is sad and hopeless, the last thing they need to feel is that they are the only ones in the world with that feeling. So, if you feel sorry for someone, don't pretend to be happy. Don't pretend to care only about their problems.
The main thing to do is pay attention. Pay close attention to everything, notice what no one else notices. Then you'll know what no one else knows, and that's always useful.