cheat sheets.

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TODO Items and Checkboxes
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rotate the state of the current item              C-c C-t
select next/previous state                        S-LEFT/RIGHT
select next/previous set                          C-S-LEFT/RIGHT
view TODO items in a sparse tree                  C-c C-v
view 3rd TODO keyword's sparse tree               C-3 C-c C-v
set the priority of the current item              C-c , [ABC]
remove priority cookie from current item          C-c , SPC
raise/lower priority of current item              S-UP/DOWN [3]
insert new checkbox item in plain list            M-S-RET
toggle checkbox(es) in region/entry/at point      C-c C-x C-b
toggle checkbox at point                          C-c C-c
checkbox statistics cookies                       insert [/] or [%]
update checkbox statistics (C-u : whole file)     C-c #