(Emacs+Org-Mode) How To Probably Configure Everything For UTF-8 In Emacs

There are a lot of snippets laying around about how to configure Emacs for Unicode UTF-8. I’ve copy and pasted all of them at one time of another. Tonight I read the manual about how to configure Language Environments and it is pretty simple:

(let ((lang 'utf-8))
  (set-language-environment lang)
  (prefer-coding-system lang))