Occur search the full list of keybinds & their commands. Very helpful for learning and remembering forgotten binds.
(defun search-keybind (regexp &optional nlines) (interactive (occur-read-primary-args)) (save-excursion (describe-bindings) (set-buffer "*Help*") (occur regexp nlines) (delete-windows-on "*Help*")))
I use C-M-u, change this to something more appropriate to emacs defaults as you see fit.
(global-set-key (kbd "C-M-u") 'search-keybind)