I think I've got the hang of it now .... 

:w 
:q 
:wq 
:wq! 
^d 
X 
exit 
^X^C
~.system 
X 
Q 
:quitbye 
CtrlAltDel 
~~q 
:~q 
logout 
save/quit 
:!QUIT 
^[zz 
^[ZZ
man help 
^C 
^c 
help 
exit 
?Quit 
?q 
CtrlShftDel 
"Hey, what does this button d..."