C-u 2 C-k Delete 2 lines.
M-z char Kill through the next occurrence of char (zap-to-char).
C-M-f Forward match brace
C-M-b Backward match brace
M-p Move to the next earlier argument string saved in the minibuffer history (previous-history-element). DOWN
M-n Move to the next later argument string saved in the minibuffer history (next-history-element).
M-r regexp RET Move to an earlier saved argument in the minibuffer history that has a match for regexp (previous-matching-history-element).
M-s regexp RET Move to a later saved argument in the minibuffer history that has a match for regexp next-matching-history-element).
Typing M-c within an incremental search toggles the case sensitivity of that search.
C-x b buffer <RET> Select or create a buffer named buffer (switch-to-buffer).
C-x 4 b buffer <RET> Similar, but select buffer in another window (switch-to-buffer-other-window).
C-M-o Insert new line after this line with proper indentation
M-^ Append this line to line before this line.
C-x 4 b bufname RET Select buffer bufname in another window. This runs switch-to-buffer-other-window
C-u 10 <down-arrow> macro to press 10 times the down-arrow
M-; Insert or align comment (indent-for-comment).
C-x ; Set comment column (set-comment-column).
C-u - C-x ; Kill comment on current line (kill-comment).
C-M-j Like RET followed by inserting and aligning a comment (indent-new-comment-line).
http://www.math.uh.edu/~bgb/emacs_keys.html
