<p>Not that I’m doing much with it yet other than the more minibuffer completion, but I really notice when <a href="http://www.emacswiki.org/emacs/Icicles">icicles</a> is not installed or inactive, so I’ve ended up adding it to every Emacs installation I use. <a href="http://www.emacswiki.org/emacs/ELPA">ELPA</a> is coming in really handy as it’s a matter of just installing icicles via one of its repos rather than having to install it manually. I’m really going off manual…