I can see that this might work with some keyboards, but I think the Apple one is too low-profile.

Also, if you're not using C-M-... shortcuts, you're missing out:

C-M-{s,r} isearch-{forward/backward}-regexp (indispensable)

C-M-% query-replace-regexp (indispensable)

C-M-\ indent-region (indispensable for when M-q would mess up your line breaks)

C-M-x eval-defun (for running changes to your .emacs without restarting)

C-M-q indent-pp-sexp (pretty-print and reindent sexp at point)

C-M-{f,b,u,d,a,e,k,t} forward/back/up/down/beginning/end/kill/transpose sexps

C-M-{n,p} {forward/backward}-list

C-M-v scroll-other-window

And so on. C-h k (describe-key) is your friend.