Álvaro Ramírez
Inserting numbers with Emacs multiple cursors
TIL that multiple cursor's mc/insert-numbers enables you to quickly enter increasing numbers for each cursor. I have mc/insert-numbers bound to # in region-bindings-mode-map. By default, sequence starts at 0, but invoking mc/insert-numbers with prefix enables you to quickly change that.
Came in handy when numbering an org table: