esc : command
i : insert 
v: visual mode
C-v: visual block

h, j, k, l

3w: move forward 3 words
30i- Esc: insert 30 -

f: find
F: previous
3fq: 3rd occurance of q
*: next word under cursor
#: previous 
/: search
n: next
N: previous

%: matching parentheses

o, O

x: current
X: previous
r: replace
d: delete
p: paste
dd: delete current line, and copy to clipboard
yy: copy current line (ddP)

.
N<cmd> : repeat N times

:w: save
:q! : quit without saving 
:q : quit
:wq
:e <path> : open file

u: undo
C-r: redo

:help

a: after cursor
o: new line
O: new line before current line
cw: replace word

C-n
C-p

qa: record to a
@a: replay a
@@: replay latest macro
qaYp<C-a>q : q stop record