Vim

Most important

:w save
:q quit
:q! quit without saving
u undo
ctrl R redo
:help help

Modes

i,o,O,etc... insert mode
esc normal mode
v visual mode
ctrl-V visual block

Movement

hjkl => move by letter , wbe => move by word

a end of word
A end of line
number action (repeat x times)
f,t jump in line
% jump brackets
0 full left
$ full right
G bottom
gg top
:number line number
ctrl-D jump down
ctrl-U jump up
/search-term, n || N

Editing

dtl 'delete to l'
y,yy copy
. repeat last command

Console

:! node server.js