Emacs: Open Recently Opened File
recentf-mode to turn it on.
recentf-open-files to list and open recently opened file.
To open the file, just press a digit key. Or, move cursor to the line and press Enter.
Turn on Recentf for Future Sessions
Put this in your emacs init file:
;; keep a list of recently opened files (require 'recentf) (recentf-mode 1)
It's good to give it a easy key. [see Emacs: How to Define Keys]