Writing in emacs?

Is anyone writing in emacs and want to share their setup? Major modes, minor modes, handy keyboard mappings, export and conversion helpers?

I'm a Linux guy and gedit is just not cutting the mustard for me anymore. Atom has a whole slew of great and useful plugins, but it's a slow-starting beast. The cli toolchain is sucking too much of my time and energy (what was that pandoc flag?)

Tips and commented dotfile examples appreciated.

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