I second Emacswiki as suggested, but I find quite a bit by searching through the Emacs and Elisp info pages and using M-x apropos / M-x apropos-variable. It doe

I second Emacswiki as suggested, but I find quite a bit by searching through the Emacs and Elisp info pages and using M-x apropos / M-x apropos-variable. It doesn't always work though - to find something, you generally need to know what Emacs calls it.