Try not to get too emotionally engaged, try not to be stupid, try not to care too much about others being stupid. 

Understand that you can be wrong, and anyone else can be wrong.

Sometimes you need to take up an 'I don't care' attitude, which means you will NOT be posting "I don't care", or "who cares?"  on the forums.

Keep your head cool and your heart steely, and maybe you can survive the internet.

I assume you're American.