*** Global Font Lock mode
Font Lock mode can be turned on globally, in buffers that support it, by the new command global-font-lock-mode. You can use the new variable font-lock-global-modes to control which modes have Font Lock mode automagically turned on. By default, this variable is set so that Font Lock mode is turned on globally where the buffer mode supports it.

For example, to automagically turn on Font Lock mode where supported, put:

(global-font-lock-mode t)

in your ~/.emacs.