set backupcopy=yes
set softtabstop=4
set autoindent
syn on
set cindent
set shiftwidth=4
set shiftround
set expandtab
set formatoptions=t
set textwidth=0
set mouse=a
set bg=dark
map <f5> :set hls!<bar>set hls?<CR>
map <f6> :set paste!<bar>set paste?<CR>

Auto indent and auto syntax highlighting. I use a black background terminal, so the “set bg=dark” optimizes the colors for a dark background. I like 4 spaces for my indenting, no tabs. I use the F5 key to toggle search result highlighting, and F6 to toggle between paste mode (no auto-indent) and no-paste mode.