Fix a typo

KeysAction
xDelete character
h lMove left / right

Change a word

KeysAction
w bMove by word
ciwChange inner word

Remove a line

KeysAction
j kMove down / up
ddDelete line

Trim a phrase

KeysAction
vStart selection
h lExtend selection
dDelete selection

Move a sentence

KeysAction
ddCut line
j kMove down / up
pPut after

Insert text

KeysAction
i aInsert before / after
I AStart / end of line
o ONew line below / above

Replace a character

KeysAction
rReplace character

Copy text

KeysAction
yy ywCopy line / word
p PPut after / before

Use counts

KeysAction
3wMove three words
2dd 3xDelete several
3pPut three times

Find within a line

KeysAction
f FFind forward / backward
t TStop before / after
; ,Repeat / reverse find
KeysAction
/ ?Search forward / backward
n NNext / previous match

Edit text objects

KeysAction
ci" ci' ci(Change inside delimiters
diw dawDelete inner / whole word

Repeat edits

KeysAction
.Repeat the last change

Match delimiters

KeysAction
%Jump to the matching delimiter

Jump through files

KeysAction
12GJump to a numbered line
gg GFirst / last line
ctrl-o ctrl-iBack / forward through jumps

Set and return to marks

KeysAction
maSet mark a
'a `aReturn to its line / exact position