I already covered the awesomely commented diminish.el. Here's another trick to reduce the cruft in your modeline:
(defmacro rename-modeline (package-name mode new-name) `(eval-after-load ,package-name '(defadvice ,mode (after rename-modeline activate) (setq mode-name ,new-name)))) (rename-modeline "js2-mode" js2-mode "JS2") (rename-modeline "clojure-mode" clojure-mode "Clj")
With this, I reduce the
I stole it from Bodil's .emacs.d and macroified it a little. The first argument is the package name, the second is the mode in question, and the third is the new lighter for the mode.