Vim

Movements

h ←
l →
k ↑
j ↓
0 Go to the first character of the line
^ Go to the first non-blank charater of the line
$ Go to the end of the line
gg Go to the first line
G Go to the last line

Buffers

:ls List buffers
:e Reload current bufffer
:bd!|e [file] Open file in current buffer
:N,Mbd Delete buffers from N to M

Windows

:q Quit the current window
:q! Quit the current window, discard any changes
:clo Close the current window, unless it is the last one
:on Make the current window the only one
Ctrl-W s Create a horizontal split
Ctrl-W v Create a vertical split
Ctrl-W h Go to left window
Ctrl-W l Go to right window
Ctrl-W k Go to up window
Ctrl-W j Go to down window

Scrolling

z<CR> or zt Put current line to top of screen (<CR> == Enter)
z. or zz Put current line to center of screen
z- or zb Put current line to bottom of screen

Commands

To search through command history, enter the prefix of your previous command and push <Up>.

To configure command history size

:set history=1000

Folds

zo Open one fold
zc Close one fold
zr Reduce folding
zm Fold more
zR Open all folds
zM Close all folds

Diff mode

[c Jump to the previous conflict
]c Jump to the next conflict
:diffg [bufspec] Copy change from [bufspec] the current buffer
:diffp [bufspec] Copy change from the current buffer to [bufspec]
:'<,'>diffg :'<,'>diffp Copy change in the selected region

Config

Use the same config for both Vim and Neovim:

mkdir -p ~/.config/
ln -s ~/.vim ~/.config/nvim 
ln -s ~/.vimrc ~/.config/nvim/init.vim