Very true. I think the key to efficiency is alway happiness. When you're happy with your environment, you most likely can work without worries or disturbances a

Very true. I think the key to efficiency is alway happiness. When you're happy with your environment, you most likely can work without worries or disturbances and are thus efficient. So, use the tools that make you happy. Personally, I use Emacs and I love it. But I don't think that Emacs inherently makes me more efficient than, say Vim or Sublime Text. That said, you should use a tool with sufficient power so you are not limited by it. So no Notepad, sorry.