This is the very minimal Vim configuration that makes me more productive than vanilla Vim. I usually use this on server.

.vimrc

syntax enable
syntax on
filetype plugin indent on

set number
set relativenumber

set tabstop=2
set softtabstop=2
set shiftwidth=2
set expandtab

set ruler

set incsearch
set showmatch
set ignorecase
set smartcase
set hlsearch

nnoremap <LEADER><SPACE> :nohlsearch<CR>
inoremap jk <ESC>

if !isdirectory($HOME."/.vim")
  call mkdir($HOME."/.vim", "", 0770)
endif
if !isdirectory($HOME."/.vim/undo-dir")
  call mkdir($HOME."/.vim/undo-dir", "", 0770)
endif
set undodir=~/.vim/undo-dir
if has ('persistent_undo')
  set undofile
  set undolevels=250
  set undoreload=500
endif

set t_SI=^[[5\ q
set t_SR=^[[4\ q
set t_EI=^[[1\ q