Surround with brackets

Select with visual mode.

Use

c()<Esc>P

Visual mode

Visual mode for lines (Visual Line mode)

V

Visual mode for characters

v

Leave insert mode

Ctrl-C or ESC

More movements

Insert line above

O

Insert line below

o

Paste above

P

Paste below

p

Search

/

Hop through results: n reverse: N

Go to next occurrence: * reverse: #

Horizontal Movement

Find and select character

f / F <character>

Find and not select character

t / T <character>

Example combo with d

df <character>

Delete until <character>

Delete and insert

Delete character

x / X

Delete character and enter insert mode

s

Delete line and enter insert mode

S

Vertical Movement

Move to top

H

Move to bottom

L

Move to middle

M

Search and replace

Search for all occurrences of foo and replace with bar after confirmation

:%s/foo/bar/gc

Navigation

Open finder

:e <folder>

Jump between two last buffers

Ctrl + ^

Set mark with

m <letter>

Set global mark with

m <Shift + letter>

Splits

All under Ctrl + W are window controls.

Vertical

Ctrl + W v

Horizontal

Ctrl + W s

Equal split

Ctrl + W =

Resize horizontally

:resize 10

Resize vertically

:vertical resize 20