cheat sheets.

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Structure Editing
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insert new heading/item at current level          M-RET
insert new heading after subtree                  C-RET
insert new TODO entry/checkbox item               M-S-RET
promote/demote current heading up one level       M-LEFT/RIGHT
promote/demote current subtree up one level       M-S-LEFT/RIGHT
move subtree/list item up/down                    M-S-UP/DOWN
refile subtree                                    C-c C-w
kill subtree                                      C-c C-x C-w
copy subtree                                      C-c C-x M-w
yank subtree                                      C-c C-x C-y
narrow buffer to current subtree                  C-x n s
widen restriction to full buffer                  C-x n w