A very simple but effective thing, eldoc-mode is a MinorMode which shows you, in the echo area, the argument list of the function call you are currently writing. Very handy. By NoahFriedman. Part of Emacs. OverviewProject homepage on GNU ELPA: http://elpa.gnu.org/packages/eldoc.html ElDoc works for EmacsLisp and certain other language modes that implement support for ElDoc. These include CEldocMod