32:  How do I turn on Auto-Fill mode by default?
  
  To turn on Auto-Fill mode just once for one buffer, use "M-x
  auto-fill-mode".  To turn it on for every buffer in, for example, Text
  mode, do this:
  
    (setq text-mode-hook 'turn-on-auto-fill)
  
  If you want Auto-Fill mode on in all major modes, do this:
  
    (setq-default auto-fill-hook 'do-auto-fill)